FUEL SUPPLY DEVICE

A fuel supply device for a four-cycle internal combustion engine using hydrogen as fuel and including cylinders, comprising: an intake passage including a branch portion branching from an upstream side toward a downstream side so as to correspond to the number of cylinders, a single pipe portion on an upstream side of the branch portion, and intake port portions on a downstream side of the branch portion; and a plurality of first fuel injection valves provided in each of the intake port portions, wherein a maximum injection period of the first fuel injection valve is corresponding to an opening period of an intake valve of the internal combustion engine, a second fuel injection valve is provided in the single pipe portion or the branch portion, and a minimum injection quantity of the second fuel injection valve is smaller than a minimum injection quantity of the first fuel injection valve.