To provide a fuel pump device for vehicle engines, capable of ensuring the volume of parts mounted on the vehicle to be disposed in the vicinity of the engine, restraining vibration, and protecting the vehicle when an external force is applied thereto.

A fuel pump device 1 for an engine 4 of an arrangement structure with an air cleaner 8 and a battery 9 disposed on one side in the vehicle width direction of the engine 4, and a brake booster 10 disposed between the engine 4 and a dash panel 6 on the other side, includes: a fuel pump body 100; and a fuel pump mounting part 102. The fuel pump mounting part 102 is provided so as to be inclined upward toward the obliquely backward direction from a camshaft to the engine hood side on the end part of the other side in the vehicle width direction in an upper part of a cam housing 14.