diff --git a/yobble.xcodeproj/project.pbxproj b/yobble.xcodeproj/project.pbxproj
index b24a89f..856e416 100644
--- a/yobble.xcodeproj/project.pbxproj
+++ b/yobble.xcodeproj/project.pbxproj
@@ -411,10 +411,10 @@
 				"INFOPLIST_KEY_UIStatusBarStyle[sdk=iphonesimulator*]" = UIStatusBarStyleDefault;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				IPHONEOS_DEPLOYMENT_TARGET = 15.6;
+				IPHONEOS_DEPLOYMENT_TARGET = 16;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 11.5;
+				MACOSX_DEPLOYMENT_TARGET = 11;
 				MARKETING_VERSION = 0.1;
 				PRODUCT_BUNDLE_IDENTIFIER = org.yobble.yobble;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -424,7 +424,7 @@
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2,7";
-				XROS_DEPLOYMENT_TARGET = 1.3;
+				XROS_DEPLOYMENT_TARGET = 1;
 			};
 			name = Debug;
 		};
@@ -451,10 +451,10 @@
 				"INFOPLIST_KEY_UIStatusBarStyle[sdk=iphonesimulator*]" = UIStatusBarStyleDefault;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				IPHONEOS_DEPLOYMENT_TARGET = 15.6;
+				IPHONEOS_DEPLOYMENT_TARGET = 16;
 				LD_RUNPATH_SEARCH_PATHS = "@executable_path/Frameworks";
 				"LD_RUNPATH_SEARCH_PATHS[sdk=macosx*]" = "@executable_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 11.5;
+				MACOSX_DEPLOYMENT_TARGET = 11;
 				MARKETING_VERSION = 0.1;
 				PRODUCT_BUNDLE_IDENTIFIER = org.yobble.yobble;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -464,7 +464,7 @@
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2,7";
-				XROS_DEPLOYMENT_TARGET = 1.3;
+				XROS_DEPLOYMENT_TARGET = 1;
 			};
 			name = Release;
 		};
diff --git a/yobble/Network/ChatModels.swift b/yobble/Network/ChatModels.swift
index 4e2d397..5a9868e 100644
--- a/yobble/Network/ChatModels.swift
+++ b/yobble/Network/ChatModels.swift
@@ -10,6 +10,25 @@ struct PrivateChatHistoryData: Decodable {
     let hasMore: Bool
 }
 
+struct PrivateMessageSendData: Decodable {
+    let messageId: String
+    let chatId: String
+    let createdAt: Date?
+
+    private enum CodingKeys: String, CodingKey {
+        case messageId
+        case chatId
+        case createdAt
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        self.messageId = try container.decodeFlexibleString(forKey: .messageId)
+        self.chatId = try container.decodeFlexibleString(forKey: .chatId)
+        self.createdAt = try container.decodeIfPresent(Date.self, forKey: .createdAt)
+    }
+}
+
 struct PrivateChatListItem: Decodable, Identifiable {
     enum ChatType: String, Decodable {
         case `self`
@@ -76,6 +95,32 @@ struct MessageItem: Decodable, Identifiable {
         self.updatedAt = try container.decodeIfPresent(Date.self, forKey: .updatedAt)
         self.forwardMetadata = try container.decodeIfPresent(ForwardMetadata.self, forKey: .forwardMetadata)
     }
+
+    init(
+        messageId: String,
+        messageType: String,
+        chatId: String,
+        senderId: String,
+        senderData: ChatProfile?,
+        content: String?,
+        mediaLink: String?,
+        isViewed: Bool?,
+        createdAt: Date?,
+        updatedAt: Date?,
+        forwardMetadata: ForwardMetadata?
+    ) {
+        self.messageId = messageId
+        self.messageType = messageType
+        self.chatId = chatId
+        self.senderId = senderId
+        self.senderData = senderData
+        self.content = content
+        self.mediaLink = mediaLink
+        self.isViewed = isViewed
+        self.createdAt = createdAt
+        self.updatedAt = updatedAt
+        self.forwardMetadata = forwardMetadata
+    }
 }
 
 struct ForwardMetadata: Decodable {
diff --git a/yobble/Network/ChatService.swift b/yobble/Network/ChatService.swift
index 8a83c3a..580dcde 100644
--- a/yobble/Network/ChatService.swift
+++ b/yobble/Network/ChatService.swift
@@ -111,6 +111,52 @@ final class ChatService {
         }
     }
 
+    func sendPrivateMessage(
+        chatId: String,
+        content: String,
+        completion: @escaping (Result<PrivateMessageSendData, Error>) -> Void
+    ) {
+        let payload: [String: Any] = [
+            "chat_id": chatId,
+            "content": content,
+            "message_type": ["text"]
+        ]
+
+        guard let body = try? JSONSerialization.data(withJSONObject: payload, options: []) else {
+            completion(.failure(ChatServiceError.decoding(debugDescription: "Невозможно сериализовать тело запроса.")))
+            return
+        }
+
+        client.request(
+            path: "/v1/chat/private/send",
+            method: .post,
+            headers: ["Content-Type": "application/json"],
+            body: body,
+            requiresAuth: true
+        ) { [decoder] result in
+            switch result {
+            case .success(let response):
+                do {
+                    let apiResponse = try decoder.decode(APIResponse<PrivateMessageSendData>.self, from: response.data)
+                    guard apiResponse.status == "fine" else {
+                        let message = apiResponse.detail ?? NSLocalizedString("Не удалось отправить сообщение.", comment: "")
+                        completion(.failure(ChatServiceError.unexpectedStatus(message)))
+                        return
+                    }
+                    completion(.success(apiResponse.data))
+                } catch {
+                    let debugMessage = Self.describeDecodingError(error: error, data: response.data)
+                    if AppConfig.DEBUG {
+                        print("[ChatService] send private message decode failed: \(debugMessage)")
+                    }
+                    completion(.failure(ChatServiceError.decoding(debugDescription: debugMessage)))
+                }
+            case .failure(let error):
+                completion(.failure(error))
+            }
+        }
+    }
+
     private static func decodeDate(from decoder: Decoder) throws -> Date {
         let container = try decoder.singleValueContainer()
         let string = try container.decode(String.self)
diff --git a/yobble/Resources/Localizable.xcstrings b/yobble/Resources/Localizable.xcstrings
index f03a539..c468373 100644
--- a/yobble/Resources/Localizable.xcstrings
+++ b/yobble/Resources/Localizable.xcstrings
@@ -938,6 +938,9 @@
           }
         }
       }
+    },
+    "Не удалось отправить сообщение." : {
+
     },
     "Не удалось подготовить данные запроса." : {
       "comment" : "Profile update encoding error"
@@ -1983,6 +1986,9 @@
     },
     "Сообщение" : {
 
+    },
+    "Сообщение слишком длинное." : {
+
     },
     "Сообщите о материалах" : {
       "comment" : "feedback category subtitle: content",
diff --git a/yobble/ViewModels/PrivateChatViewModel.swift b/yobble/ViewModels/PrivateChatViewModel.swift
index bcccc65..80c2fc1 100644
--- a/yobble/ViewModels/PrivateChatViewModel.swift
+++ b/yobble/ViewModels/PrivateChatViewModel.swift
@@ -6,15 +6,19 @@ final class PrivateChatViewModel: ObservableObject {
     @Published private(set) var isInitialLoading: Bool = false
     @Published private(set) var isLoadingMore: Bool = false
     @Published var errorMessage: String?
+    @Published private(set) var isSending: Bool = false
 
     private let chatService: ChatService
     private let chatId: String
+    private let currentUserId: String?
     private let pageSize: Int
+    private let maxMessageLength: Int = 4096
     private var hasMore: Bool = true
     private var didLoadInitially: Bool = false
 
-    init(chatId: String, chatService: ChatService = ChatService(), pageSize: Int = 30) {
+    init(chatId: String, currentUserId: String?, chatService: ChatService = ChatService(), pageSize: Int = 30) {
         self.chatId = chatId
+        self.currentUserId = currentUserId
         self.chatService = chatService
         self.pageSize = pageSize
     }
@@ -43,6 +47,59 @@ final class PrivateChatViewModel: ObservableObject {
         }
     }
 
+    func sendMessage(text: String, completion: @escaping (Bool) -> Void) {
+        let trimmed = text.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !trimmed.isEmpty else {
+            completion(false)
+            return
+        }
+        guard trimmed.count <= maxMessageLength else {
+            errorMessage = NSLocalizedString("Сообщение слишком длинное.", comment: "")
+            completion(false)
+            return
+        }
+        guard !isSending else {
+            completion(false)
+            return
+        }
+        guard let currentUserId else {
+            completion(false)
+            return
+        }
+
+        isSending = true
+
+        chatService.sendPrivateMessage(chatId: chatId, content: trimmed) { [weak self] result in
+            guard let self else { return }
+
+            switch result {
+            case .success(let data):
+                let newMessage = MessageItem(
+                    messageId: data.messageId,
+                    messageType: "text",
+                    chatId: data.chatId,
+                    senderId: currentUserId,
+                    senderData: nil,
+                    content: trimmed,
+                    mediaLink: nil,
+                    isViewed: true,
+                    createdAt: data.createdAt,
+                    updatedAt: data.createdAt,
+                    forwardMetadata: nil
+                )
+
+                self.messages = Self.merge(existing: self.messages, newMessages: [newMessage])
+                self.errorMessage = nil
+                completion(true)
+            case .failure(let error):
+                self.errorMessage = self.message(for: error)
+                completion(false)
+            }
+
+            self.isSending = false
+        }
+    }
+
     func refresh() {
         didLoadInitially = false
         loadInitialHistory(force: true)
diff --git a/yobble/Views/Chat/PrivateChatView.swift b/yobble/Views/Chat/PrivateChatView.swift
index 49ceb49..a78a25b 100644
--- a/yobble/Views/Chat/PrivateChatView.swift
+++ b/yobble/Views/Chat/PrivateChatView.swift
@@ -6,11 +6,13 @@ struct PrivateChatView: View {
 
     @StateObject private var viewModel: PrivateChatViewModel
     @State private var hasPositionedToBottom: Bool = false
+    @State private var draftText: String = ""
+    @FocusState private var isComposerFocused: Bool
 
     init(chat: PrivateChatListItem, currentUserId: String?) {
         self.chat = chat
         self.currentUserId = currentUserId
-        _viewModel = StateObject(wrappedValue: PrivateChatViewModel(chatId: chat.chatId))
+        _viewModel = StateObject(wrappedValue: PrivateChatViewModel(chatId: chat.chatId, currentUserId: currentUserId))
     }
 
     var body: some View {
@@ -37,6 +39,9 @@ struct PrivateChatView: View {
                 hasPositionedToBottom = false
             }
         }
+        .safeAreaInset(edge: .bottom) {
+            composer
+        }
     }
 
     @ViewBuilder
@@ -185,6 +190,48 @@ struct PrivateChatView: View {
         .padding(.top, 8)
     }
 
+    private var composer: some View {
+        VStack(spacing: 0) {
+            Divider()
+
+            HStack(alignment: .center, spacing: 12) {
+                TextField(NSLocalizedString("Сообщение", comment: ""), text: $draftText, axis: .vertical)
+                    .lineLimit(1...4)
+                    .focused($isComposerFocused)
+                    .submitLabel(.send)
+                    .disabled(viewModel.isSending || currentUserId == nil)
+                    .onSubmit { sendCurrentMessage() }
+
+                Button(action: sendCurrentMessage) {
+                    Image(systemName: viewModel.isSending ? "hourglass" : "paperplane.fill")
+                        .font(.system(size: 18, weight: .semibold))
+                }
+                .disabled(isSendDisabled)
+                .buttonStyle(.plain)
+            }
+            .padding(.vertical, 10)
+            .padding(.horizontal, 16)
+            .background(.clear)
+        }
+        .background(.ultraThinMaterial)
+    }
+
+    private var isSendDisabled: Bool {
+        draftText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty || viewModel.isSending || currentUserId == nil
+    }
+
+    private func sendCurrentMessage() {
+        let text = draftText.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !text.isEmpty else { return }
+
+        viewModel.sendMessage(text: text) { success in
+            if success {
+                draftText = ""
+                hasPositionedToBottom = true
+            }
+        }
+    }
+
     private static let timeFormatter: DateFormatter = {
         let formatter = DateFormatter()
         formatter.dateStyle = .none