diff --git a/qweechat/preferences.py b/qweechat/preferences.py
new file mode 100644
index 0000000..68d30e3
--- /dev/null
+++ b/qweechat/preferences.py
@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+#
+# preferences.py - preferences dialog box
+#
+# This file is part of QWeeChat, a Qt remote GUI for WeeChat.
+#
+# QWeeChat 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.
+#
+# QWeeChat 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 QWeeChat.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import qt_compat
+import config
+from buffer import GenericListWidget
+
+QtCore = qt_compat.import_module('QtCore')
+QtGui = qt_compat.import_module('QtGui')
+
+
+class PreferencesDialog(QtGui.QDialog):
+    """Preferences dialog."""
+
+    def __init__(self, name, config, *args):
+        QtGui.QDialog.__init__(*(self,) + args)
+        self.setModal(True)
+        self.setWindowTitle(name)
+        self.config = config
+        self.stacked_panes = QtGui.QStackedWidget()
+        self.list_panes = PreferencesListWidget()
+        splitter = QtGui.QSplitter()
+        splitter.addWidget(self.list_panes)
+        splitter.addWidget(self.stacked_panes)
+
+        for section_name in config.sections():
+            item = QtGui.QListWidgetItem(section_name)
+            pane = PreferencesPaneWidget(section_name)
+            self.list_panes.addItem(item)
+            self.stacked_panes.addWidget(pane)
+            for name, value in config.items(section_name):
+                pane.addItem(name, value)
+        self.list_panes.currentRowChanged.connect(self._pane_switch)
+
+        hbox = QtGui.QHBoxLayout()
+        self.dialog_buttons = QtGui.QDialogButtonBox()
+        self.dialog_buttons.setStandardButtons(
+            QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Cancel)
+        self.dialog_buttons.rejected.connect(self.close)
+        self.dialog_buttons.accepted.connect(self._save_and_close)
+
+        hbox.addStretch(1)
+        hbox.addWidget(self.dialog_buttons)
+        hbox.addStretch(1)
+
+        vbox = QtGui.QVBoxLayout()
+        vbox.addWidget(splitter)
+        vbox.addLayout(hbox)
+
+        self.setLayout(vbox)
+        self.show()
+
+    def _pane_switch(self, index):
+        """Switch the visible preference pane."""
+        if index >= 0:
+            self.stacked_panes.setCurrentIndex(index)
+
+    def _save_and_close(self):
+        for widget in (self.stacked_panes.widget(i)
+                       for i in range(self.stacked_panes.count())):
+            for key, field in widget.fields.iteritems():
+                self.config.set(widget.section_name, key, str(field.text()))
+        config.write(self.config)
+        self.close()
+
+
+class PreferencesListWidget(GenericListWidget):
+    """Widget with list of preferences."""
+
+    def __init__(self, *args):
+        GenericListWidget.__init__(*(self,) + args)
+
+    def switch_prev_buffer(self):
+        if self.currentRow() > 0:
+            self.setCurrentRow(self.currentRow() - 1)
+        else:
+            self.setCurrentRow(self.count() - 1)
+
+    def switch_next_buffer(self):
+        if self.currentRow() < self.count() - 1:
+            self.setCurrentRow(self.currentRow() + 1)
+        else:
+            self.setCurrentRow(0)
+
+
+class PreferencesPaneWidget(QtGui.QWidget):
+    """
+    Widget with (from top to bottom):
+    title, chat + nicklist (optional) + prompt/input.
+    """
+
+    def __init__(self, section_name):
+        QtGui.QWidget.__init__(self)
+        self.grid = QtGui.QGridLayout()
+        self.section_name = section_name
+        self.fields = {}
+        self.setLayout(self.grid)
+
+    def addItem(self, key, value):
+        """Add a key-value pair."""
+        line = len(self.fields)
+        self.grid.addWidget(QtGui.QLabel(key.capitalize()), line, 0)
+        line_edit = QtGui.QLineEdit()
+        line_edit.setFixedWidth(200)
+        line_edit.insert(value)
+        if key == 'password':
+            line_edit.setEchoMode(QtGui.QLineEdit.Password)
+        self.grid.addWidget(line_edit, line, 1)
+        self.fields[key] = line_edit
diff --git a/qweechat/qweechat.py b/qweechat/qweechat.py
index cf0bca3..e430d35 100644
--- a/qweechat/qweechat.py
+++ b/qweechat/qweechat.py
@@ -44,6 +44,7 @@ from connection import ConnectionDialog
 from buffer import BufferListWidget, Buffer
 from debug import DebugDialog
 from about import AboutDialog
+from preferences import PreferencesDialog
 from version import qweechat_version
 
 QtCore = qt_compat.import_module('QtCore')
@@ -198,10 +199,8 @@ class MainWindow(QtGui.QMainWindow):
 
     def open_preferences_dialog(self):
         """Open a dialog with preferences."""
-        # TODO: implement the preferences dialog box
-        messages = ['Not yet implemented!',
-                    '']
-        self.preferences_dialog = AboutDialog('Preferences', messages, self)
+        self.preferences_dialog = PreferencesDialog('Preferences', self.config,
+                                                    self)
 
     def save_connection(self):
         """Save connection configuration."""