diff --git a/src/main/java/com/example/cosmos_serversb/models/SessionManager.java b/src/main/java/com/example/cosmos_serversb/models/SessionManager.java
new file mode 100644
index 0000000..d0595c1
--- /dev/null
+++ b/src/main/java/com/example/cosmos_serversb/models/SessionManager.java
@@ -0,0 +1,73 @@
+package com.example.cosmos_serversb.models;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+
+import javax.inject.Singleton;
+
+
+@Singleton
+public class SessionManager {
+    private static SessionManager theInstance = null;
+    private static SessionFactory sessionFactory;
+    private static Session session = null;
+
+    private SessionManager(){
+        setUp();
+    }
+
+    public static SessionManager getInstance(){
+        if(theInstance == null){
+            theInstance = new SessionManager();
+        }
+        return theInstance;
+    }
+
+    public static Session getSession(){
+        if(session == null){
+            session = sessionFactory.openSession();
+            session.beginTransaction();
+        }
+        return session;
+    }
+
+    public static void closeSession(){
+        session.getTransaction().commit();
+        session.close();
+        session = null;
+    }
+
+
+    public static void setUp() {
+        // A SessionFactory is set up once for an application!
+        final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
+                .configure() // configures settings from hibernate.cfg.xml
+                .build();
+        try {
+            sessionFactory = new MetadataSources( registry ).buildMetadata().buildSessionFactory();
+        }
+        catch (Exception e) {
+            // The registry would be destroyed by the SessionFactory, but we had trouble building the SessionFactory
+            // so destroy it manually.
+            StandardServiceRegistryBuilder.destroy( registry );
+        }
+    }
+
+    public static void tearDown() {
+        try {
+            if ( sessionFactory != null ) {
+                sessionFactory.close();
+            }
+        } catch (Exception e) {
+            System.out.println("Exception!");
+        }
+    }
+
+    public static SessionFactory getSessionFactory(){
+        return sessionFactory;
+    }
+
+}
diff --git a/src/test/java/hibernateTest/entities/Group.java b/src/test/java/hibernateTest/entities/Group.java
index c90b14e..b14a4d5 100644
--- a/src/test/java/hibernateTest/entities/Group.java
+++ b/src/test/java/hibernateTest/entities/Group.java
@@ -86,8 +86,8 @@
 
     public void addMember(String uId){
         //test用
-//        User user = new User(uId, uId, "http:test", "sa", "hogehoge");
-        User user = Users.getInstance().getUserById(uId);
+        User user = new User(uId, uId, "http:test", "sa", "hogehoge");
+//        User user = Users.getInstance().getUserById(uId);
         members.add(user);
         user.addGroups(this);
     }
diff --git a/src/test/java/hibernateTest/models/Main.java b/src/test/java/hibernateTest/models/Main.java
index 8f2a16a..f1ba112 100644
--- a/src/test/java/hibernateTest/models/Main.java
+++ b/src/test/java/hibernateTest/models/Main.java
@@ -6,9 +6,9 @@
 public class Main {
     public static void main(String args[]){
         NativeApiIllustrationTest test = new NativeApiIllustrationTest();
-//        test.setUp();
-//        test.testBasicUsage();//Hibernate全般のテストが行えます。
+        test.setUp();
+        test.testBasicUsage();//Hibernate全般のテストが行えます。
 //        test.GroupMemberTest();//Group-Memberテーブルに関するテストが行えます。
-//        test.tearDown();
+        test.tearDown();
     }
 }
diff --git a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
index 2cfd078..c997103 100644
--- a/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
+++ b/src/test/java/hibernateTest/models/NativeApiIllustrationTest.java
@@ -264,7 +264,7 @@
 		/*リレーションを持たせた分の出力*/
 		//Setは要素の順番に意味がないため、出力の順番はrId順ではありません。
 		Group outGroup = session.load(Group.class, "111");
-		Set<Request> set = outGroup.getRequests();//Listとして取り出す。
+		Set<Request> set = outGroup.getRequests();
 		System.out.println("グループID111のリクエスト一覧");
 		for ( Request request : (Set<Request>) set ) {
 			System.out.println( "rId: " + request.getrId() + " " + request.getUri() + " " + request.getProduct());