Patent ID: 7513756

Claim:
A fuel supply pump comprising a tappet structural body and a spring sheet, wherein the tappet structural body has a penetration portion for allowing passage of a lubricant or a fuel for lubrication therethrough which is provided between a spring-holding chamber for holding a spring to be used for pushing a plunger against a cam and a cam chamber for housing a cam to be used for moving the plunger up and down, wherein the tappet structural body comprises a roller and a roller body, which roller is rotationally supported by a roller support of the roller body, a pass-through hole for allowing passage of the lubricant or the fuel for lubrication therethrough is formed in the roller body and provided as part of the penetration portion, and the pass-through hole penetrates from a side of the spring-holding chamber of an upper surface of the roller body to a non-roller portion of the roller body which is opened to a side of the cam chamber, whereby the lubricant or the fuel for lubrication is allowed to move backward and forward freely between the spring-holding chamber and the cam chamber.