A vane pump of the present invention is provided with a bearing convex portion (20) disposed in such a way to be raised from the bottom of a concave portion (13) of a cover (60) to form a bearing hole (25) and fitted into a central bore (27) of a first side plate (12), and a first locating pin (28) standing at the bottom of the concave portion (13), penetrating through the first side plate (12) and inserted into a cam ring (3).