To provide a motorcycle front body structure of a simplified design, which contributes to reduction in motorcycle height and air resistance, by the employment of a dedicated removable cover for selectively opening and closing the access opening defined in an undersurface of the lamp unit, the motorcycle front body structure includes a fairing (21) having a lamp opening (21a), a lamp unit (23) positioned in the lamp opening (21a) and having an undersurface formed with an access opening (23c), and a cover (24) removably fitted to the lamp unit (23) for covering the access opening (23c). The lamp unit (23) and the cover (24) have respective undersurfaces exposed to an air flow passage (40) above a front wheel (3).