A motorcycle that can facilitate identification of and taking in and out of an article stored below a rear seat includes a storage box that is mounted to a body frame. The front portion of the storage box is covered by a front seat. The rear portion of the storage box is covered by the rear seat and the rear seat is surrounded by the rear spoiler. The rear spoiler has an opening portion that is almost-rectangular as viewed from above. When the rear seat is removed, an article can be put in and taken out from the storage box through the opening portion. A first seal member is attached to the bottom plate of the rear seat, and is pressed against the circumferential edge portion of the opening portion to thereby seal between the rear seat and the rear spoiler.