PURPOSE: To simplify locking and unlocking of outer plate cover members of a motorcycle to and from each other without using screw parts by locking the outer side cover members to each other via fasteners attached to the each of the cover members.

CONSTITUTION: A front fender 1 and a front cover 2 are positioned by the fitting together of a guide pin 4 and a guide hole 6 and the upper end edge 1b of the fender 1b is joined to the side edge 2a of the cover 2 by the joining together of magic fasteners 5, 7. A plurality of magic fasteners 8 are stuck to the outer surface of a curved wall 2c formed at the upper end portion of the front cover 2. A positioning guide pin 9 and a magic fastener 10 are similarly provided at the side edge 3a of a leg shield 3 and a magic fastener 12 is formed at the rear edge 1c of the fender 1 correspondingly to the magic fastener 10. Similarly, magic fasteners 16, 17, 18 are lap joined to one another and tightened to a belt member 15. As a result, a force exerted along the side face shows strong resistance so the magic fasteners can easily be peeled with a small resisting force against a peeling force which works perpendicular to the side face.