A motorcycle includes a detachable pannier. A rear surface of the pannier includes a first inclined surface extending downward from an upper end so as to be inclined rearward, and a second inclined surface extending downward from a lower end of the first inclined surface so as to be inclined rearward at an angle greater than the first inclined surface. A light distribution requirement that a tail lamp and a turn indicator can be seen from a rear side is met in a state where the pannier is mounted.