To provide a motor scooter type vehicle having high waterproof and dustproof performance, by reducing influence of heat, water and dust to a controller, by sufficiently securing capacity of a storage box.

The bottom of the storage box 7A above an engine body 13 is formed in an oblique forward-downward shape toward a front part of the engine body 13 in a vehicle side view, and a range surrounded by a line X'-X' of connecting an upper part of a cylinder head 41 and an upper part of an air cleaner 48A and a unit swing type engine 10 and a throttle body 49 are superposed, and a fuel injection means 50 is arranged in any one of the cylinder head 41 for constituting a cylinder assembly 39 or an intake pipe 56 connected to the cylinder head 41 in a state of projecting an upper part of the fuel injection means 50 from the range, and a throttle position sensor for detecting opening of a throttle valve in an intake passage 54, is arranged in a side part of the throttle body 49.