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 87235e2..cc51cc5 100644
--- a/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
+++ b/src/main/java/org/ntlab/nemophila/models/accounts/Account.java
@@ -61,17 +61,14 @@
 
     //新規投稿
     public Post createPost(String sid, int rate, String genre, String comment, String image1, String image2, String image3) {
-        Post post = new Post();
-
-        post.setId(sid);
-        post.setRate(rate);
-        post.setGenre(genre);
-        //コメントと写真は必須ではない。nullで登録できる？？？
-        //無理ならnull時「なし」に変換させて登録で。
-        post.setComment(comment);
+        Post post = new Post(this, genre, rate, sid);
+        //pidの登録
+        post.setId(String.valueOf(posts.size()+1));
+        //null時「なし」に変換させて登録。
         post.setImage1(image1);
         post.setImage2(image2);
         post.setImage3(image3);
+        post.setComment(comment);
 
         posts.put(post.getId(), post);
 
diff --git a/src/main/java/org/ntlab/nemophila/models/accounts/Post.java b/src/main/java/org/ntlab/nemophila/models/accounts/Post.java
index e9f93e1..84cbf94 100644
--- a/src/main/java/org/ntlab/nemophila/models/accounts/Post.java
+++ b/src/main/java/org/ntlab/nemophila/models/accounts/Post.java
@@ -1,5 +1,6 @@
 package org.ntlab.nemophila.models.accounts;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 public class Post {
@@ -19,7 +20,7 @@
     private String comment;
     @JsonProperty("sid")
     private String sid;
-    @JsonProperty("owner")
+    @JsonIgnore
     private Account owner;
 
     public Post(Account owner, String genre, int rate, String sid){