diff --git a/app/src/main/java/com/example/tampopo_client/models/ChatMessage.java b/app/src/main/java/com/example/tampopo_client/models/ChatMessage.java
index 754a7e1..1b364e8 100644
--- a/app/src/main/java/com/example/tampopo_client/models/ChatMessage.java
+++ b/app/src/main/java/com/example/tampopo_client/models/ChatMessage.java
@@ -2,12 +2,14 @@
 
 public class ChatMessage {
     private String senderId;  // メッセージ送信者のID
+    private String senderNickname; // メッセージ送信者のニックネーム
     private String content;   // メッセージ本文
 
     public ChatMessage() {}
 
-    public ChatMessage(String senderId, String content) {
+    public ChatMessage(String senderId, String senderNickname, String content) {
         this.senderId = senderId;
+        this.senderNickname = senderNickname;
         this.content = content;
     }
 
@@ -17,6 +19,15 @@
     public void setSenderId(String senderId) {
         this.senderId = senderId;
     }
+
+    public String getSenderNickname() {
+        return senderNickname;
+    }
+
+    public void setSenderNickname(String senderNickname) {
+        this.senderNickname = senderNickname;
+    }
+
     public String getContent() {
         return content;
     }