A scooter-type motorcycle is provided with a fuel cell system for driving the motorcycle by an electric power and includes: a vehicle body including a pair of left and right upper frames extending in a longitudinal direction of the vehicle body and a pair of left and right lower frames extending in the longitudinal direction of the vehicle body and having rear side end portions bent and connected to the respective upper frames; a fuel cell mounted on the vehicle body; a fuel tank connected to the fuel cell, in which the fuel tank is disposed in a center tunnel surrounded by the upper frames and the lower frames. A pair of left and right upper frames and a pair of left and right lower frames constitute a fuel tank supporting structure.