diff --git a/edmond/bot.py b/edmond/bot.py
index 5402769..287d578 100644
--- a/edmond/bot.py
+++ b/edmond/bot.py
@@ -12,6 +12,8 @@ from edmond.log import Logger
 
 class Bot(irc.client.SimpleIRCClient, Logger):
 
+    CHANNELS_RUNTIME_KEY = "_channels"
+
     def __init__(self, config, logger):
         super().__init__()
         self.config = config
@@ -30,6 +32,13 @@ class Bot(irc.client.SimpleIRCClient, Logger):
     def names(self):
         return (self.nick, *self.config["alternative_nicks"])
 
+    @property
+    def channels(self):
+        """List of joined channels."""
+        if self.CHANNELS_RUNTIME_KEY not in self.values:
+            self.values[self.CHANNELS_RUNTIME_KEY] = []
+        return self.values[self.CHANNELS_RUNTIME_KEY]
+
     def _get_storage(self):
         """Load data from storage."""
         try:
@@ -61,11 +70,13 @@ class Bot(irc.client.SimpleIRCClient, Logger):
     def on_join(self, connection, event):
         if event.source.nick == self.nick:
             self.log_i(f"Joined {event.target}.")
+            self.channels.append(event.target)
         self.run_plugin_callbacks(event)
 
     def on_part(self, connection, event):
         if event.source.nick == self.nick:
             self.log_i(f"Left {event.target} (args: {event.arguments[0]}).")
+            self.channels.remove(event.target)
         self.run_plugin_callbacks(event)
 
     def on_pubmsg(self, connection, event):