diff --git a/gui/CMakeLists.txt b/gui/CMakeLists.txt
index 6343a48..c54b4af 100644
--- a/gui/CMakeLists.txt
+++ b/gui/CMakeLists.txt
@@ -38,7 +38,9 @@ add_executable(chiaki
 		include/servericonwidget.h
 		src/servericonwidget.cpp
 		include/settings.h
-		src/settings.cpp)
+		src/settings.cpp
+		include/registdialog.h
+		src/registdialog.cpp)
 target_include_directories(chiaki PRIVATE include)
 
 target_link_libraries(chiaki chiaki-lib chiaki-cli-lib)
diff --git a/gui/include/registdialog.h b/gui/include/registdialog.h
new file mode 100644
index 0000000..9eb1281
--- /dev/null
+++ b/gui/include/registdialog.h
@@ -0,0 +1,48 @@
+/*
+ * This file is part of Chiaki.
+ *
+ * Chiaki is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chiaki is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chiaki.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef CHIAKI_REGISTDIALOG_H
+#define CHIAKI_REGISTDIALOG_H
+
+#include <chiaki/regist.h>
+
+#include <QDialog>
+
+class Settings;
+
+class QLineEdit;
+
+class RegistDialog : public QDialog
+{
+	Q_OBJECT
+
+	private:
+		Settings *settings;
+
+		ChiakiRegist regist;
+		bool regist_active;
+
+		QLineEdit *host_edit;
+		QLineEdit *psn_id_edit;
+		QLineEdit *pin_edit;
+
+	public:
+		explicit RegistDialog(Settings *settings, QWidget *parent = nullptr);
+		~RegistDialog();
+};
+
+#endif // CHIAKI_REGISTDIALOG_H
diff --git a/gui/src/mainwindow.cpp b/gui/src/mainwindow.cpp
index 2dc8b6d..57461ef 100644
--- a/gui/src/mainwindow.cpp
+++ b/gui/src/mainwindow.cpp
@@ -19,6 +19,7 @@
 #include <dynamicgridwidget.h>
 #include <serveritemwidget.h>
 #include <settings.h>
+#include <registdialog.h>
 
 #include <QTableWidget>
 #include <QVBoxLayout>
@@ -50,6 +51,13 @@ MainWindow::MainWindow(Settings *settings, QWidget *parent)
 	tool_bar_spacer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Ignored);
 	tool_bar->addWidget(tool_bar_spacer);
 
+	auto regist_action = new QAction(tr("Register"), this);
+	tool_bar->addAction(regist_action);
+	connect(regist_action, &QAction::triggered, this, [this]() {
+		RegistDialog dialog(this->settings, this);
+		dialog.exec();
+	});
+
 	auto settings_action = new QAction(tr("Settings"), this);
 	tool_bar->addAction(settings_action);
 	connect(settings_action, &QAction::triggered, this, &MainWindow::ShowSettings);
diff --git a/gui/src/registdialog.cpp b/gui/src/registdialog.cpp
new file mode 100644
index 0000000..11b0fe1
--- /dev/null
+++ b/gui/src/registdialog.cpp
@@ -0,0 +1,50 @@
+/*
+ * This file is part of Chiaki.
+ *
+ * Chiaki is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chiaki is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chiaki.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <registdialog.h>
+
+#include <QFormLayout>
+#include <QLineEdit>
+#include <QRegularExpressionValidator>
+
+static const QRegularExpression pin_re("[0-9][0-9][0-9][0-9][0-9][0-9]");
+
+RegistDialog::RegistDialog(Settings *settings, QWidget *parent)
+	: QDialog(parent),
+	settings(settings)
+{
+	regist_active = false;
+
+	auto layout = new QFormLayout(this);
+	setLayout(layout);
+
+	host_edit = new QLineEdit(this);
+	layout->addRow(tr("Host:"), host_edit);
+
+	psn_id_edit = new QLineEdit(this);
+	layout->addRow(tr("PSN ID (username):"), psn_id_edit);
+
+	pin_edit = new QLineEdit(this);
+	pin_edit->setValidator(new QRegularExpressionValidator(pin_re, pin_edit));
+	layout->addRow(tr("PIN:"), pin_edit);
+}
+
+RegistDialog::~RegistDialog()
+{
+	if(regist_active)
+		chiaki_regist_fini(&regist);
+}
\ No newline at end of file