diff --git a/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaModel.java b/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaModel.java
index 3bbdeb4a..a4dff2e2 100644
--- a/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaModel.java
+++ b/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaModel.java
@@ -70,35 +70,4 @@ public class XmlMetaModel {
         this.pages = pages;
     }
 
-    // Public Methods
-
-    public void addPage(XmlMetaPageModel page) {
-        this.pages.add(page);
-    }
-
-    public void addPageAfterIndex(int index, XmlMetaPageModel page) {
-        this.pages.add(index, page);
-
-        //Update index
-        this.updateIndex();
-    }
-
-    public void removePage(XmlMetaPageModel page) {
-        this.pages.remove(page);
-    }
-
-    public void removePageAtIndex(int index) {
-        this.pages.remove(index);
-
-        //Update index
-        this.updateIndex();
-    }
-
-    // Internal Methods
-    private void updateIndex() { // TODO-rca: 効率悪そう
-        for (int i = 0; i < this.pages.size(); i++) {
-            this.pages.get(i).setIndex(i);
-        }
-    }
-
 }
diff --git a/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaPageModel.java b/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaPageModel.java
index 2a4d0e5a..089aab2b 100644
--- a/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaPageModel.java
+++ b/model/src/main/java/one/nem/lacerta/model/document/internal/XmlMetaPageModel.java
@@ -2,7 +2,6 @@ package one.nem.lacerta.model.document.internal;
 
 public class XmlMetaPageModel {
 
-    int index;
     String filename;
 
     // Constructor
@@ -10,27 +9,18 @@ public class XmlMetaPageModel {
     public XmlMetaPageModel() {
     }
 
-    public XmlMetaPageModel(int index, String filename) {
-        this.index = index;
+    public XmlMetaPageModel(String filename) {
         this.filename = filename;
     }
 
     // Getter
 
-    public int getIndex() {
-        return index;
-    }
-
     public String getFilename() {
         return filename;
     }
 
     // Setter
 
-    public void setIndex(int index) {
-        this.index = index;
-    }
-
     public void setFilename(String filename) {
         this.filename = filename;
     }
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 1eada540..d6b15343 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
@@ -102,11 +102,10 @@ public class DocumentProcessorImpl implements DocumentProcessor{
 
         XmlMetaPageModel xmlMetaPageModel = new XmlMetaPageModel();
         xmlMetaPageModel.setFilename(filename);
-        xmlMetaPageModel.setIndex(xmlMetaModel.getPages().size() + 1);
         xmlMetaModel.getPages().add(xmlMetaPageModel);
 
         logger.info("addNewPageToLast", "finished");
-        logger.info("addNewPageToLast", "filename: " + filename + ", index: " + xmlMetaPageModel.getIndex());
+        logger.info("addNewPageToLast", "filename: " + filename);
     }
 
     @Override
@@ -118,19 +117,6 @@ public class DocumentProcessorImpl implements DocumentProcessor{
         } // TODO-rca: 効率悪いので改善する
     }
 
-    // Internal
-    // Indexを振り直す
-    private ArrayList<XmlMetaPageModel> reIndexPages(ArrayList<XmlMetaPageModel> pages) {
-        logger.debug("reIndexPages", "called"); // TODO-rca: 効率化
-        ArrayList<XmlMetaPageModel> newPages = new ArrayList<>();
-        for (int i = 0; i < pages.size(); i++) {
-            XmlMetaPageModel xmlMetaPageModel = pages.get(i);
-            xmlMetaPageModel.setIndex(i + 1);
-            newPages.add(xmlMetaPageModel);
-        }
-        return newPages;
-    }
-
     @Override
     public void addNewPageAfterIndex(Bitmap bitmap, int index) throws Exception {
         logger.debug("addNewPageAfterIndex", "called");
@@ -140,9 +126,7 @@ public class DocumentProcessorImpl implements DocumentProcessor{
 
         XmlMetaPageModel xmlMetaPageModel = new XmlMetaPageModel();
         xmlMetaPageModel.setFilename(filename);
-        xmlMetaPageModel.setIndex(index + 1);
         xmlMetaModel.getPages().add(index, xmlMetaPageModel);
-        xmlMetaModel.setPages(reIndexPages(xmlMetaModel.getPages()));
     }
 
     @Override
@@ -154,9 +138,7 @@ public class DocumentProcessorImpl implements DocumentProcessor{
 
         XmlMetaPageModel xmlMetaPageModel = new XmlMetaPageModel();
         xmlMetaPageModel.setFilename(filename);
-        xmlMetaPageModel.setIndex(index);
         xmlMetaModel.getPages().add(index - 1, xmlMetaPageModel);
-        xmlMetaModel.setPages(reIndexPages(xmlMetaModel.getPages()));
     }
 
     @Override
diff --git a/utils/src/main/java/one/nem/lacerta/utils/impl/XmlMetaParserImpl.java b/utils/src/main/java/one/nem/lacerta/utils/impl/XmlMetaParserImpl.java
index efc6b1b3..7874a0b9 100644
--- a/utils/src/main/java/one/nem/lacerta/utils/impl/XmlMetaParserImpl.java
+++ b/utils/src/main/java/one/nem/lacerta/utils/impl/XmlMetaParserImpl.java
@@ -41,7 +41,6 @@ public class XmlMetaParserImpl implements XmlMetaParser{
             for(int i = 0; i < rootElement.getElementsByTagName("pages").getLength(); i++) {
                 Element pageElement = (Element) rootElement.getElementsByTagName("page").item(i);
                 XmlMetaPageModel page = new XmlMetaPageModel();
-                page.setIndex(Integer.parseInt(pageElement.getElementsByTagName("index").item(0).getTextContent()));
                 page.setFilename(pageElement.getElementsByTagName("filename").item(0).getTextContent());
                 pages.add(page);
             }
@@ -73,7 +72,6 @@ public class XmlMetaParserImpl implements XmlMetaParser{
             Element pagesElement = document.createElement("pages");
             for(XmlMetaPageModel page : meta.getPages()) {
                 Element pageElement = document.createElement("page");
-                appendElement(document, pageElement, "index", String.valueOf(page.getIndex()));
                 appendElement(document, pageElement, "filename", page.getFilename());
                 pagesElement.appendChild(pageElement);
             }