In a motorcycle, a fuel tank shroud is arranged on each side of the fuel tank so that the shrouds cover at least part of both side surfaces of the fuel tank. The rear portions of the shrouds are stably supported to avoid vibration. Each shroud is formed of synthetic resin and integrally includes a main portion for covering the side of a fuel tank, a supporting arm portion extending inward from a rear portion of the main portion and sandwiched between a front portion of a seat and a rear portion of the fuel tank, and an engaging portion projecting from a distal end of the supporting arm portion. A bottom plate of the seat is integrally provided with a latching portion for allowing removable engagement with the engaging portion of the fuel tank shrouds, whereby the rear portion of the shrouds are supported.