diff --git a/source/src/main/java/one/nem/lacerta/source/database/dao/FolderDao.java b/source/src/main/java/one/nem/lacerta/source/database/dao/FolderDao.java
index be3ccbe7..1d429245 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/dao/FolderDao.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/dao/FolderDao.java
@@ -1,8 +1,23 @@
 package one.nem.lacerta.source.database.dao;
 
 import androidx.room.Dao;
+import androidx.room.Insert;
+import androidx.room.Query;
+
+import one.nem.lacerta.source.database.entity.FolderEntity;
 
 @Dao
 public interface FolderDao {
 
+    @Query("SELECT * FROM Folder WHERE id = :id")
+    FolderEntity findById(String id);
+
+    @Query("SELECT * FROM Folder WHERE public_path = :publicPath")
+    FolderEntity findByPublicPath(String publicPath);
+
+    @Insert
+    void insert(FolderEntity folderEntity);
+
+    @Insert
+    void insertAll(FolderEntity... folderEntities);
 }
diff --git a/source/src/main/java/one/nem/lacerta/source/database/entity/FolderEntity.java b/source/src/main/java/one/nem/lacerta/source/database/entity/FolderEntity.java
index d8236696..f3a9091d 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/entity/FolderEntity.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/entity/FolderEntity.java
@@ -16,4 +16,7 @@ public class FolderEntity {
     @ColumnInfo(name = "title")
     public String name; // フォルダ名
 
+    @ColumnInfo(name = "public_path")
+    public String publicPath; // 公開パス
+
 }