diff --git a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
index 84cd138..87235e2 100644
--- a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
+++ b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
@@ -13,12 +13,15 @@
     private String name;
     @JsonProperty("id")
     private String id;
-
     @JsonIgnore
     private String pw;
     @JsonProperty("token")
     private String token;
 
+    //Accountから対応するFriendManagerを1つ呼び出す(初期化)
+    @JsonIgnore
+    FriendManager friendManager = new FriendManager();
+
     //コンストラクタ
     public Account(String name, String pw) {
         this.name = name;
@@ -86,16 +89,14 @@
     }
 
     //投稿削除
-    public void deletePost(Post post) {
-        posts.remove(post);
+    public void deletePost(String pid) {
+        posts.remove(pid);
     }
     //投稿数の取得
     public int getPostsCount() {
         return posts.size();
     }
 
-    //Accountから対応するFriendManagerを1つ呼び出す(初期化)
-    FriendManager friendManager = new FriendManager();
     public FriendManager getFriendManager() {
         return friendManager;
     }