diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 22e6566..da2bad6 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -76,6 +76,8 @@ MainWindow::MainWindow()
             &MainWindow::onExportSalesJsonActionTriggered);
     connect(ui_.importSalesJsonAction, &QAction::triggered, this,
             &MainWindow::onImportSalesJsonActionTriggered);
+
+    readGeometry();
 }
 
 void MainWindow::onActionEditSellerTriggered()
@@ -353,3 +355,29 @@ void MainWindow::onImportSalesJsonActionTriggered()
     }
     setSaleModel();
 }
+
+void MainWindow::writeGeometry()
+{
+    QSettings settings;
+
+    settings.beginGroup("mainwindow");
+    settings.setValue("size", size());
+    settings.setValue("pos", pos());
+    settings.endGroup();
+}
+
+void MainWindow::readGeometry()
+{
+    QSettings settings;
+
+    settings.beginGroup("mainwindow");
+    resize(settings.value("size", QSize(800, 600)).toSize());
+    move(settings.value("pos", QPoint(200, 200)).toPoint());
+    settings.endGroup();
+}
+
+void MainWindow::closeEvent(QCloseEvent* event)
+{
+    writeGeometry();
+    event->accept();
+}
\ No newline at end of file
diff --git a/src/gui/mainwindow.h b/src/gui/mainwindow.h
index 685d57c..ee99fd7 100644
--- a/src/gui/mainwindow.h
+++ b/src/gui/mainwindow.h
@@ -6,6 +6,7 @@
 #include <marketplace.h>
 
 #include <QMainWindow>
+#include <QtGui/QCloseEvent>
 
 #include <memory>
 
@@ -29,6 +30,9 @@ class MainWindow : public QMainWindow
     void onAboutQt();
     void onAbout();
 
+  protected:
+    virtual void closeEvent(QCloseEvent* event) override;
+
   private:
     void onActionEditSellerTriggered();
     void onSellerNoEditCheckSellerNo();
@@ -39,6 +43,8 @@ class MainWindow : public QMainWindow
     void onExportSalesJsonActionTriggered();
     void onImportSalesJsonActionTriggered();
     void setSaleModel();
+    void writeGeometry();
+    void readGeometry();
 
     Ui::MainWindow ui_;
     std::unique_ptr<Marketplace> marketplace_;