An electromagnetic valve-controlled fuel injection pump for internal combustion engines, especially diesel engines, comprises an electromagnetic valve (18) whose valve needle (17), via a valve seat (16) located inside the pump body, disconnects a high-pressure area (14, 15) from a low-pressure area (21) or connects the high-pressure and low-pressure areas, whereby the duration of injection is controlled by the opening of the electromagnetic valve (18). In addition, a low-pressure compensating plunger (24), which is arranged inside the low-pressure area (21), is provided for compensating for variations in pressure inside this low-pressure area (21). The invention is characterized in that the low-pressure compensating plunger (24), which is arranged coaxial to the electromagnetic valve needle (17), is provided as a component that is separate from the electromagnetic valve needle (17). This ensures an unimpeded and thus fastest possible opening of the electromagnetic valve (18) by the opening force that the electromagnet exerts upon the electromagnetic valve needle (17).