diff --git a/source/src/main/java/one/nem/lacerta/source/database/entity/Tag.java b/source/src/main/java/one/nem/lacerta/source/database/entity/Tag.java
index 14e293b5..85f4a20f 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/entity/Tag.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/entity/Tag.java
@@ -1,4 +1,15 @@
 package one.nem.lacerta.source.database.entity;
 
+import androidx.room.Entity;
+import androidx.room.PrimaryKey;
+
+@Entity(tableName = "tag")
 public class Tag {
+
+    @PrimaryKey
+    public String id; // タグID
+
+    public String name; // タグ名
+
+    public String color; // タグの色
 }