diff --git a/app/src/main/java/com/example/nemophila/entities/ErrorType.java b/app/src/main/java/com/example/nemophila/entities/ErrorType.java
new file mode 100644
index 0000000..4ab24d7
--- /dev/null
+++ b/app/src/main/java/com/example/nemophila/entities/ErrorType.java
@@ -0,0 +1,19 @@
+package com.example.nemophila.entities;
+
+public enum ErrorType {
+    ResponseError("レスポンスエラー"),
+    NetworkError("ネットワークエラー"),
+    InvalidToken("トークンが不一致"),
+    UnknownError("不明なエラー"),
+    ResponseNoyFound("リソースが見つかりません");
+
+    private final String text;
+
+    ErrorType(String text) {
+        this.text = text;
+    }
+
+    public String getText() {
+        return text;
+    }
+}
diff --git a/app/src/main/java/com/example/nemophila/viewmodels/FriendViewModel.java b/app/src/main/java/com/example/nemophila/viewmodels/FriendViewModel.java
index 83c6596..6a5f9f7 100644
--- a/app/src/main/java/com/example/nemophila/viewmodels/FriendViewModel.java
+++ b/app/src/main/java/com/example/nemophila/viewmodels/FriendViewModel.java
@@ -4,6 +4,7 @@
 import androidx.lifecycle.ViewModel;
 
 import com.example.nemophila.entities.AccountNameJson;
+import com.example.nemophila.entities.ErrorType;
 import com.example.nemophila.entities.Post;
 import com.example.nemophila.entities.PostJson;
 import com.example.nemophila.resources.AccountsRest;
@@ -26,6 +27,7 @@
     private final MutableLiveData<Collection<AccountNameJson>> friendsLiveData;
     private final MutableLiveData<Collection<AccountNameJson>> requestedLiveData;
     private final MutableLiveData<Collection<AccountNameJson>> requestingLiveData;
+    private final MutableLiveData<String> errorLiveData;
 
     // コンストラクタ
     public FriendViewModel() {
@@ -37,6 +39,7 @@
         this.friendsLiveData = new MutableLiveData<>();
         this.requestedLiveData = new MutableLiveData<>();
         this.requestingLiveData = new MutableLiveData<>();
+        this.errorLiveData = new MutableLiveData<>();
     }
 
     // ライブデータの取得（ゲッター）
@@ -47,6 +50,9 @@
         return requestedLiveData;
     }
     public MutableLiveData<Collection<AccountNameJson>> getRequestingLiveData() { return requestingLiveData; }
+    public MutableLiveData<String> getErrorLiveData() {
+        return errorLiveData;
+    }
 
 
 //フレンドの情報の取得
@@ -60,11 +66,13 @@
                     friendsLiveData.setValue(response.body());
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Collection<AccountNameJson>> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -79,11 +87,13 @@
                     System.out.println("Successful");
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Void> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -98,11 +108,13 @@
                     System.out.println("Successful");
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Void> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -117,11 +129,13 @@
                     System.out.println("Successful");
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Collection<AccountNameJson>> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -136,11 +150,13 @@
                     addRequestingLiveData(requesting_id, name);
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Void> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -155,11 +171,13 @@
                     System.out.println("Successful Delete");
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Void> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -175,11 +193,13 @@
                     requestedLiveData.setValue(accountNameJson);
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Collection<AccountNameJson>> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -194,11 +214,13 @@
                     removeRequestedLiveData(fid);
                 } else {
                     System.out.println("ResponseError: " + response.code());
+                    errorLiveData.setValue(parseStatusCode(response.code()));
                 }
             }
             @Override
             public void onFailure(Call<Void> call, Throwable t) {
                 System.out.println(" NetworkError: " + t);
+                errorLiveData.setValue(ErrorType.NetworkError.getText());
             }
         });
     }
@@ -251,4 +273,17 @@
         }
         requestedLiveData.setValue(preData);
     }
+
+    private String parseStatusCode(Integer stats) {
+        switch (stats) {
+            case 404:
+                return ErrorType.ResponseNoyFound.getText();
+            case 401:
+                return ErrorType.InvalidToken.getText();
+            case 400:
+                return ErrorType.ResponseError.getText();
+            default:
+                return ErrorType.UnknownError.getText();
+        }
+    }
 }