An electromagnetic fuel injector including an injector body, a valve housing mounted in a front portion of the injector body and having an injection hole at a front end thereof, a solenoid coil mounted in a rear portion of the injector body, a valve axially movably received in the valve housing, an armature fixed to a rear end portion of the valve, a spring for normally biasing the valve in a valve closing direction, and a nozzle mounted to the front end of the valve housing and having a plurality of atomizer holes communicated with the injection hole of the valve housing. The valve is reciprocated by a magnetic attraction force due to excitation of the solenoid coil and a reaction force of the spring to thereby intermittently inject fuel from the injection hole. An atomizer plate is provided between the nozzle and the injection hole. The atomizer plate has a fuel colliding portion against which the fuel injected from the injection hole collides.