A mirror housing for an exterior rear-view mirror on a vehicle exhibits a mirror face received in an opening and directed towards the vehicle tail. The mirror housing also exhibits a water channel which runs around the mirror housing adjacent to the opening, which water channel is integrated into the mirror housing opposite the housing surface with side walls sunk in with respect to said housing surface, and by means of which water which impinges in a drive mode is collected before it reaches the opening and is channelled in the direction of the lower housing edge. The mirror housing terminates, between the lower opening border and the water channel, in a strip which is oriented, at an angle with respect to the housing surface, in the direction of the tail and downwards.