A high-pressure fuel supply pump comprising: - a suction valve provided on a suction side of a pressurizing chamber; - an engagement member having a protrusion part which protrudes toward an outer periphery side and biases the suction valve by use of force of a spring; - a stator which generates magnetic attraction force; and - a movable element which is sucked by the magnetic attraction force and drives the engagement member toward the stator by being engaged with the protrusion part, wherein flow passage area between an outer periphery part of the protrusion part and an inner periphery part of the movable element is formed smallest in a region from the spring space to a fuel path formed in the movable element, and the protrusion part is further formed with a tapered section which broadens flow passage area, and the tapered section is included in the outer periphery part of the protrusion part and has an outer diameter reduced toward the fuel path from a portion having the smallest flow passage area in a region with the inner periphery part, wherein the engagement member has a cylindrical part having a diameter smaller than a diameter of the protrusion part and extending toward the spring, and wherein the protrusion part and the cylindrical part are disposed on an inner periphery side of a recessed part formed in the movable element, characterized in that: the spring is held by being wounded around the cylindrical part on the inner periphery side of the recessed part, and wherein the flow passage area between the outer periphery part of the protrusion part and the inner periphery part of the movable element is smaller than a fuel flow passage between the cylindrical part and the stator. - a suction valve provided on a suction side of a pressurizing chamber; - an engagement member having a protrusion part which protrudes toward an outer periphery side and biases the suction valve by use of force of a spring; - a stator which generates magnetic attraction force; and - a movable element which is sucked by the magnetic attraction force and drives the engagement member toward the stator by being engaged with the protrusion part, wherein flow passage area between an outer periphery part of the protrusion part and an inner periphery part of the movable element is formed smallest in a region from the spring space to a fuel path formed in the movable element, and the protrusion part is further formed with a tapered section which broadens flow passage area, and the tapered section is included in the outer periphery part of the protrusion part and has an outer diameter reduced toward the fuel path from a portion having the smallest flow passage area in a region with the inner periphery part, wherein the engagement member has a cylindrical part having a diameter smaller than a diameter of the protrusion part and extending toward the spring, and wherein the protrusion part and the cylindrical part are disposed on an inner periphery side of a recessed part formed in the movable element, characterized in that: the spring is held by being wounded around the cylindrical part on the inner periphery side of the recessed part, and wherein the flow passage area between the outer periphery part of the protrusion part and the inner periphery part of the movable element is smaller than a fuel flow passage between the cylindrical part and the stator. flow passage area between an outer periphery part of the protrusion part and an inner periphery part of the movable element is formed smallest in a region from the spring space to a fuel path formed in the movable element, and the protrusion part is further formed with a tapered section which broadens flow passage area, and the tapered section is included in the outer periphery part of the protrusion part and has an outer diameter reduced toward the fuel path from a portion having the smallest flow passage area in a region with the inner periphery part, wherein the engagement member has a cylindrical part having a diameter smaller than a diameter of the protrusion part and extending toward the spring, and wherein the protrusion part and the cylindrical part are disposed on an inner periphery side of a recessed part formed in the movable element, the spring is held by being wounded around the cylindrical part on the inner periphery side of the recessed part, and wherein the flow passage area between the outer periphery part of the protrusion part and the inner periphery part of the movable element is smaller than a fuel flow passage between the cylindrical part and the stator.