<p>At the present invention a high-pressure fuel pump (100) is comprises of: a plunger (2) which slidably fits to a cylinder (6) and reciprocates for pressurizing and discharging a fuel taken in a pressurizing chamber (11); an inlet valve device (3) for taking in a fuel into the pressurizing chamber (11); an outlet valve device (8) for discharging the pressurized fuel from the pressurizing chamber (11); and a communicating pass (6A,6B) which comprises a hole or a groove formed in the cylinder (6), and communicates between a pressurized fuel area (11) and a gap between the cylinder (6) and the plunger (2).</p>
