Abstract: An injector includes an injection nozzle to inject high-pressure fuel, and a main part connected to the injection nozzle in an axis direction. The injection nozzle has a nozzle body, and a cylindrical member having an inner circumference face to support a nozzle needle slidable in the axis direction. The nozzle body has a cylinder to accommodate the nozzle needle and the cylindrical member. The cylindrical member is liquid-tightly connected to the main part in the axis direction. A sliding clearance is defined between the nozzle needle and the cylindrical member, and an annular fuel passage is defined between the cylinder and the cylindrical member.