diff --git a/app/src/main/java/com/example/sprout/refactor/util/PreferenceUtil.java b/app/src/main/java/com/example/sprout/refactor/util/PreferenceUtil.java
new file mode 100644
index 0000000..8419677
--- /dev/null
+++ b/app/src/main/java/com/example/sprout/refactor/util/PreferenceUtil.java
@@ -0,0 +1,62 @@
+package com.example.sprout.refactor.util;
+
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+
+import com.example.sprout.Sprout;
+
+import java.util.Map;
+
+/**
+ * Created by matsumoto_k on 2017/11/29.
+ */
+
+public class PreferenceUtil {
+
+    private static final PreferenceUtil ourInstance = new PreferenceUtil();
+    private SharedPreferences sharedPreferences = null;
+
+    public static PreferenceUtil getInstance() {
+        return ourInstance;
+    }
+
+    private PreferenceUtil() {
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(Sprout.get().getApplicationContext());
+    }
+
+    public enum Key {
+        REGISTERED, // アカウント登録済みかどうか
+        USER_ID // ユーザーid
+    }
+
+    public void saveInt(Key key, int value) {
+        sharedPreferences.edit().putInt(key.name(), value).apply();
+    }
+
+    public void saveBoolean(Key key, Boolean value) {
+        sharedPreferences.edit().putBoolean(key.name(), value).apply();
+    }
+
+    public int getInt(Key key) {
+        return sharedPreferences.getInt(key.name(), 0);
+    }
+
+    public boolean getBoolean(Key key) {
+        return sharedPreferences.getBoolean(key.name(), false);
+    }
+
+    public boolean getBoolean(Key key, Boolean defaultValue) {
+        return sharedPreferences.getBoolean(key.name(), defaultValue);
+    }
+
+    public void clearAllData() {
+        SharedPreferences.Editor editor = sharedPreferences.edit();
+        Map<String, ?> keyList = sharedPreferences.getAll();
+        if (!keyList.isEmpty()) {
+            for (String key : keyList.keySet()) {
+                editor.remove(key);
+            }
+            editor.apply();
+        }
+    }
+}