diff --git a/db/migrate/20161205033804_create_table.rb b/db/migrate/20161205033804_create_table.rb
new file mode 100644
index 0000000..e910578
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+++ b/db/migrate/20161205033804_create_table.rb
@@ -0,0 +1,52 @@
+# create tables in SQLite
+# author: alan snape(alansnape@snape3058.info)
+# date: 2016-12-5
+
+class CreateTable < ActiveRecord::Migration
+  def change
+    create_table :user do |t|
+      t.string :name
+      t.string :passwd
+      t.string :mail
+    end
+    create_table :project do |t|
+      t.string :name
+      t.text :content
+    end
+    create_table :mission do |t|
+      t.string :name
+      t.datetime :deadline
+      t.integer :priority
+      t.string :status
+    end
+    create_table :coment do |t|
+      t.text :content
+    end
+    create_table :share do |t|
+      t.text :content
+    end
+    create_table :note do |t|
+      t.text :content
+      t.integer :user_id
+    end
+    add_foreign_key(:note, :user)
+    create_table :project_user, id: false do |t|
+      t.integer :project_id
+      t.integer :user_id
+    end
+    add_foreign_key(:project_user, :project)
+    add_foreign_key(:project_user, :user)
+    create_table :mission_user, id: false do |t|
+      t.integer :mission_id
+      t.integer :user_id
+    end
+    add_foreign_key(:mission_user, :mission)
+    add_foreign_key(:mission_user, :user)
+    create_table :mission_coment, id: false do |t|
+      t.integer :mission_id
+      t.integer :coment_id
+    end
+    add_foreign_key(:mission_coment, :mission)
+    add_foreign_key(:mission_coment, :coment)
+  end
+end
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