diff --git a/tools/cabana/mainwin.cc b/tools/cabana/mainwin.cc
index 7781ab3b75..324323ac44 100644
--- a/tools/cabana/mainwin.cc
+++ b/tools/cabana/mainwin.cc
@@ -55,6 +55,9 @@ MainWindow::MainWindow() : QMainWindow() {
   charts_widget = new ChartsWidget(this);
   detail_widget = new DetailWidget(charts_widget, this);
   splitter->addWidget(detail_widget);
+  if (!settings.splitter_state.isEmpty()) {
+    splitter->restoreState(settings.splitter_state);
+  }
   main_layout->addWidget(splitter);
 
   // right widgets
@@ -247,6 +250,7 @@ void MainWindow::closeEvent(QCloseEvent *event) {
   if (floating_window)
     floating_window->deleteLater();
 
+  settings.splitter_state = splitter->saveState();
   settings.save();
   QWidget::closeEvent(event);
 }
diff --git a/tools/cabana/settings.cc b/tools/cabana/settings.cc
index b3a4ed4872..be806aa705 100644
--- a/tools/cabana/settings.cc
+++ b/tools/cabana/settings.cc
@@ -21,6 +21,7 @@ void Settings::save() {
   s.setValue("chart_theme", chart_theme);
   s.setValue("max_chart_x_range", max_chart_x_range);
   s.setValue("last_dir", last_dir);
+  s.setValue("splitter_state", splitter_state);
 }
 
 void Settings::load() {
@@ -32,6 +33,7 @@ void Settings::load() {
   chart_theme = s.value("chart_theme", 0).toInt();
   max_chart_x_range = s.value("max_chart_x_range", 3 * 60).toInt();
   last_dir = s.value("last_dir", QDir::homePath()).toString();
+  splitter_state = s.value("splitter_state").toByteArray();
 }
 
 // SettingsDlg
diff --git a/tools/cabana/settings.h b/tools/cabana/settings.h
index e08d0ae55e..624a1ce33d 100644
--- a/tools/cabana/settings.h
+++ b/tools/cabana/settings.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <QByteArray>
 #include <QComboBox>
 #include <QDialog>
 #include <QSpinBox>
@@ -19,6 +20,7 @@ public:
   int chart_theme = 0;
   int max_chart_x_range = 3 * 60; // 3 minutes
   QString last_dir;
+  QByteArray splitter_state;
 
 signals:
   void changed();