FUEL PUMP

Provided is a fuel pump including: a pump head (); a plunger barrel () in which a support hole () is provided, and one end section of which in the axial direction of the support hole () is screw-fastened into the pump head (); a plunger () that is supported in the support hole () so as to be freely movable in the axial direction; a pressurization chamber () that is defined by one end of the support hole () and one end of the plunger (); a fuel discharge passage () one end of which communicates with the pressurization chamber (); and a fuel suction passage () one end of which communicates with the pressurization chamber ().