Abstract: A detachable visor for a motorcycle helmet having a top wall with laterally spaced side wall members that extend downwardly from the lateral edges of the top wall. A laterally extending recess portion is formed in the top wall intermediate its front edge and its rear edge. The recess portion has a downwardly extending rear wall and a pair of laterally spaced downwardly extending side walls. A plurality of snap fasteners have their female portions attached to the rear surface of the rear wall and they are laterally spaced apart from each other so that they mate with the male portion of the snap fasteners that are secured to the outer surface of the forehead portion of a motorcycle helmet. A top wall cover panel is detachably secured to the side walls in the recess portion to form an aerodynamically smooth top wall surface on the detachable visor. An air flow deflector panel extends between the side wall members of the visor and functions to direct air into the interior of the helmet.