To provide a fuel feed pump that can satisfactorily maintain the function to reduce pressure pulsation of two-plate type metal diaphragm even if a pressure pulsation frequency changes.

Out of two sheets of metal diaphragm 51, 52, a diaphragm 52 is formed by pasting a resin film 53 serving as mass adding member onto the diaphragm 51, thereby weights of the diaphragm 51, 52 are varied. By adopting such configuration, when pulsation frequency of fuel pressure pulsation within an intake chamber 300 coincides with natural frequency of either one of two sheets of diaphragms, the other diaphragm can perform pressure pulsation reduction effect without resonance. Thereby, even if the pulsation frequency of the fuel pressure pulsation changes in the intake chamber, it is possible to realize a fuel feed pump that can always satisfactorily maintain pressure pulsation reduction effect of a pulsation damper consisting of two sheets of metal diaphragms.