diff --git a/app/src/main/java/com/example/citrusclient/viewmodels/TodoViewModel.java b/app/src/main/java/com/example/citrusclient/viewmodels/TodoViewModel.java
deleted file mode 100644
index fa876fa..0000000
--- a/app/src/main/java/com/example/citrusclient/viewmodels/TodoViewModel.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.example.citrusclient.viewmodels;
-
-import androidx.lifecycle.ViewModel;
-
-public class TodoViewModel extends ViewModel {
-
-    public TodoViewModel()
-    {
-        //コンストラクタ
-    }
-
-}
diff --git a/app/src/main/java/com/example/citrusclient/viewmodels/TodosViewModel.java b/app/src/main/java/com/example/citrusclient/viewmodels/TodosViewModel.java
new file mode 100644
index 0000000..f892e37
--- /dev/null
+++ b/app/src/main/java/com/example/citrusclient/viewmodels/TodosViewModel.java
@@ -0,0 +1,48 @@
+package com.example.citrusclient.viewmodels;
+
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModel;
+
+import com.example.citrusclient.rest.TodosRest;
+
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+public class TodosViewModel extends ViewModel {
+
+    private final Retrofit retrofit;
+    private final TodosRest todosRest;
+
+    //LiveData
+    private final MutableLiveData<String> titleLiveData;
+
+    //Constructor
+    public TodosViewModel()
+    {
+        this.retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/citrus/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        this.todosRest = retrofit.create(TodosRest.class);
+        this.titleLiveData = new MutableLiveData<>();
+    }
+
+    //getter
+    public MutableLiveData<String> getTitleLiveData() {return titleLiveData;};
+
+    public void getTodos()
+    {
+
+    }
+
+    public void putTodo()
+    {
+
+    }
+
+    public void deleteTodo()
+    {
+
+    }
+
+}