diff --git a/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java b/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java
index 75c8fd39..8a967ff0 100644
--- a/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java
+++ b/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java
@@ -9,8 +9,7 @@ public interface DocumentProcessor {
     // ページ操作
     void addNewPageToLast(Bitmap bitmap) throws Exception;
     void addNewPagesToLast(Bitmap[] bitmaps) throws Exception;
-    void addNewPageAfterIndex(Bitmap bitmap, int index) throws Exception;
-    void addNewPageBeforeIndex(Bitmap bitmap, int index) throws Exception;
+    void insertPageAtIndex(Bitmap bitmap, int index) throws Exception;
     void removePageAtIndex(int index) throws Exception;
 
     // 更新
diff --git a/processor/src/main/java/one/nem/lacerta/processor/impl/DocumentProcessorImpl.java b/processor/src/main/java/one/nem/lacerta/processor/impl/DocumentProcessorImpl.java
index 5efcb976..db63175c 100644
--- a/processor/src/main/java/one/nem/lacerta/processor/impl/DocumentProcessorImpl.java
+++ b/processor/src/main/java/one/nem/lacerta/processor/impl/DocumentProcessorImpl.java
@@ -94,7 +94,7 @@ public class DocumentProcessorImpl implements DocumentProcessor{
     }
 
     @Override
-    public void addNewPageAfterIndex(Bitmap bitmap, int index) throws Exception {
+    public void addNewPageAtIndex(Bitmap bitmap, int index) throws Exception {
         logger.debug("addNewPageAfterIndex", "called");
         String filename = UUID.randomUUID().toString() + ".png"; // TODO-rca: 拡張子を動的にする
 
@@ -108,22 +108,6 @@ public class DocumentProcessorImpl implements DocumentProcessor{
         lacertaVcs.insertPage(index + 1, filename);
     }
 
-    @Override
-    public void addNewPageBeforeIndex(Bitmap bitmap, int index) throws Exception {
-        logger.debug("addNewPageBeforeIndex", "called");
-        String filename = UUID.randomUUID().toString() + ".png"; // TODO-rca: 拡張子を動的にする
-
-        this.fileManager.getNewInstance().createDirectoryIfNotExist(DEFAULT_SAVE_DIR).resolve(DEFAULT_SAVE_DIR).saveBitmap(bitmap, filename);
-
-        Page page = new Page();
-        page.setFileName(filename);
-        page.setBitmap(bitmap);
-        this.documentDetail.getPages().add(index, page);
-
-        lacertaVcs.insertPage(index, filename);
-
-    }
-
     @Override
     public void removePageAtIndex(int index) {