Injector

An injector comprising:

• an injection valve main body whose tip end is linked with an injection nozzle;
• and
• a driving means arranged backward of the injection valve main body,
• wherein the injection valve main body includes a valve body,
• wherein the valve body includes in its central portion a cylinder, and further includes a high pressure fuel flow path and a low pressure fuel flow path, both of which are parallel with the cylinder,
• wherein the injection nozzle is linked with the valve body and includes a needle valve linked with the cylinder, a high pressure fuel hole linked with the high pressure fuel flow path, and a low pressure fuel hole linked with the low pressure fuel flow path,
• wherein a back end surface of the injection nozzle and a tip end surface of the valve body contact each other with pressure to form a metal seal structure to achieve a metal seal,
• wherein a recess is provided in the metal seal structure to increase a seal surface pressure, and
• an outside recess is provided outside of a metal seal in surrounding of a linkage portion between the high pressure fuel flow path and the high pressure fuel.