Fuel pipe

A fuel pipe connected to a fuel distribution pipe distributing and supplying fuel to a plurality of fuel injection devices, the fuel pipe comprising:

• a pipe body;
• and
• a connection head part fastened to the fuel distribution pipe by a cap nut,
• wherein the connection head part includes
• a first curved portion curved in a circular shape in a reference cross-section including a central axis of the fuel pipe and abutting against a seat surface formed on an inner peripheral surface of the fuel distribution pipe,
• a second curved portion curved in a circular shape in the reference cross-section and locked on a locking surface formed on an inner peripheral surface of the cap nut, and
• a straight portion extending linearly in the reference cross-section and interconnecting the first curved portion and the second curved portion, and
• wherein a line segment interconnecting a point at which the first curved portion abuts against the seat surface and a point at which the second curved portion abuts against the locking surface is inclined so as to spread toward the tip of the connection head part with respect to the central axis in the reference cross-section.