A drive device for a movable furniture part, in particular for a drawer, includes a push-out device for pushing the movable furniture part out of a closed position into an open position, and includes a locking device for locking the push-out device in a locked position. The locking device has a locking guide track, which is in particular cardioid, and a locking pin movable and lockable in the locking guide track. A control device is provided which is separate from the locking guide track and from the locking pin, and the movement of the locking pin in the locking guide track can be at least partially controlled by the control device.