To provide a fuel supply device for a motorcycle, in which a fuel pump is inserted from an upper face side of a fuel tank without deteriorating ride comfort of a rider and with reduced manufacturing cost.

In the fuel supply device for a motorcycle, the fuel tank 18 is disposed on a main frame 11 extended downward and backward from a head pipe 10 which supports a front wheel 3, and an occupant seat 19 is disposed to be continuous from the rear part of the fuel tank 18. An opening 18b is formed in an upper face front part of the fuel tank 18, a support plate 36 is disposed to the opening 18b so as to support the fuel pump 18 which is inserted from the opening, and a fuel filler 36c is formed in the support plate 36.