A control device for a kite comprises an elongate rigid control bar extending either side of a central region to provide separated hand-grippable regions for a kite user and anchor points for first and second control lines of a kite. A third control line for the kite is attached to a harness loop at one end and extends from the harness loop towards the kite. A stopper is rigidly fixed to the third control line adjacent the harness loop. The stopper is wedge shaped in a predetermined plane. A body is attached to the central region of the control bar. The body has a cavity for releasably receiving the stopper and an opening in a wall of the cavity. The cavity is wedge shape towards the opening for rotating the stopper to the predetermined plane when it engages against the inner walls of the cavity.