diff --git a/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeActivity.java b/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeActivity.java
index 930334a..5e20378 100644
--- a/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeActivity.java
+++ b/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeActivity.java
@@ -98,7 +98,7 @@ public void onClick(View view) {
                 joinUserState.setPassword(passwordEditText.getText().toString());
                 joinUserState.setRePassword(passwordEditTextCheck.getText().toString());
                 if (joinUserState.isValidData() && isEmailValidated) {
-                    changePw(new PasswordChangeRequest(joinUserState.getPassword()));
+                    changePw(new PasswordChangeRequest(joinUserState.getEmail(), joinUserState.getPassword()));
                 } else {
                     Toast.makeText(getApplicationContext(), "다시 입력해주세요", Toast.LENGTH_LONG).show();
                 }
@@ -188,9 +188,13 @@ public void onResponse(Call<JoinResponse> call, Response<JoinResponse> response)
                     AlertDialog.Builder builder = new AlertDialog.Builder(PasswordChangeActivity.this);
                     Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
                     startActivity(intent);
+                } else if(response.code() == 400) {
+                    Log.d("패스워드변경", String.valueOf(response.code()));
+                    String faileResult = "존재하지 않은 아이디 입니다. 다시 시도해주세요.";
+                    Toast.makeText(PasswordChangeActivity.this, faileResult, Toast.LENGTH_SHORT).show();
                 } else {
                     Log.d("패스워드변경", String.valueOf(response.code()));
-                    String faileResult = "비밀번호 변경에 실패하였습니다. 다시 시도해주세요.";
+                    String faileResult = "패스워드 변경 실패했습니다. 다시 시도해주세요.";
                     Toast.makeText(PasswordChangeActivity.this, faileResult, Toast.LENGTH_SHORT).show();
                 }
             }
diff --git a/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeRequest.java b/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeRequest.java
index 185df76..044545d 100644
--- a/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeRequest.java
+++ b/application/app/src/main/java/com/mnchatbot/myapplication/ui/join/PasswordChangeRequest.java
@@ -4,10 +4,13 @@
 
 //비밀번호 변경 요청
 public class PasswordChangeRequest {
+    @SerializedName("memberEmail")
+    public String inputID;
+
     @SerializedName("memberNewPassword")
     public String inputPw;
 
-    public PasswordChangeRequest(String inputPw) {
-        this.inputPw = inputPw;
+    public PasswordChangeRequest(String inputID, String inputPw) {
+        this.inputID = inputID; this.inputPw = inputPw;
     }
 }