diff --git a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/OpenAction.java b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/OpenAction.java
index dac48f9..50a0102 100644
--- a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/OpenAction.java
+++ b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/OpenAction.java
@@ -5,6 +5,7 @@
 
 import javax.swing.JFileChooser;
 import javax.swing.filechooser.FileFilter;
+import javax.swing.filechooser.FileNameExtensionFilter;
 
 import graphicalrefactor.editor.Editor;
 import graphicalrefactor.views.GraphicalRefactor;
@@ -29,6 +30,9 @@
 
 			JFileChooser fc = new JFileChooser(wd);
 
+			FileFilter model = new FileNameExtensionFilter("model",".model");
+			FileFilter dtram = new FileNameExtensionFilter("dtram", ".dtram");
+			
 			// Adds file filter for supported file format
 			FileFilter defaultFilter = new FileFilter() {
 
@@ -42,7 +46,10 @@
 					return null;
 				}
 			};
+			
 			fc.addChoosableFileFilter(defaultFilter);
+			fc.addChoosableFileFilter(model);
+			fc.addChoosableFileFilter(dtram);
 			int rc = fc.showDialog(null, "Open Model File");
 			if (rc == JFileChooser.APPROVE_OPTION) {
 				lastDir = fc.getSelectedFile().getParent();
diff --git a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/SaveAsAction.java b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/SaveAsAction.java
index 35e39bc..8245aa8 100644
--- a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/SaveAsAction.java
+++ b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/actions/SaveAsAction.java
@@ -6,6 +6,7 @@
 import javax.swing.AbstractAction;
 import javax.swing.JFileChooser;
 import javax.swing.filechooser.FileFilter;
+import javax.swing.filechooser.FileNameExtensionFilter;
 
 import graphicalrefactor.editor.Editor;
 import graphicalrefactor.views.GraphicalRefactor;
@@ -29,7 +30,10 @@
 			String wd = (lastDir  != null) ? lastDir : System.getProperty("user.dir");
 
 			JFileChooser fc = new JFileChooser(wd);
-
+			FileFilter model = new FileNameExtensionFilter("model","model");
+			FileFilter dtram = new FileNameExtensionFilter("dtram", "dtram");
+			String extension = "";
+			
 			// Adds file filter for supported file format
 			FileFilter defaultFilter = new FileFilter() {
 
@@ -44,10 +48,27 @@
 				}
 			};
 			fc.addChoosableFileFilter(defaultFilter);
+			fc.addChoosableFileFilter(model);
+			fc.addChoosableFileFilter(dtram);
 			int rc = fc.showDialog(null, "Save Model File");
 			if (rc == JFileChooser.APPROVE_OPTION) {
 				lastDir = fc.getSelectedFile().getParent();
 				editor.setCurFilePath(fc.getSelectedFile().getAbsolutePath());
+				
+				File file = fc.getSelectedFile();
+				
+				if(file != null && file.exists()) {
+					//�t�@�C�������擾
+					String name = file.getName();
+					
+					//�g���q���擾
+					extension = name.substring(name.lastIndexOf("."));
+					
+				}
+					if( extension.contains(".model")) {
+						editor.saveModel();
+						System.out.println("extension");
+					}
 				editor.save();
 				frame.setTitle(frame.title + " - " + fc.getSelectedFile().getAbsolutePath());
 			}
diff --git a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/editor/Editor.java b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/editor/Editor.java
index b07cd6c..060ec8b 100644
--- a/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/editor/Editor.java
+++ b/AlgebraicDataflowArchitectureModel/src/graphicalrefactor/editor/Editor.java
@@ -161,6 +161,25 @@
 		return null;
 	}
 	
+	public void saveModel() {
+		if (curFilePath != null) {
+			try {
+		        File file = new File(curFilePath);
+		        FileWriter filewriter = new FileWriter(file);	
+		        filewriter.write("model {\n");
+		        filewriter.write(model.getSourceText());
+		        
+		        filewriter.write("}\n");
+		        filewriter.write("geometry {\n");
+
+		        filewriter.write("}\n");
+		        filewriter.close();
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+
 	public void save() {
 		if (curFilePath != null) {
 			try {
@@ -173,7 +192,7 @@
 			}
 		}
 	}
-
+	
 	/**
 	 * Construct a mxGraph from DataFlowModel and DataFlowModel
 	 * @param model