PURPOSE: To provide the effective inclining allowance of a shaft to the movable yoke of an electromagnetic solenoid by enhancing the connecting strength of the shaft of switching an injection nozzle to a spring retainer.

CONSTITUTION: A shaft 15 is extended from the movable yoke 9 of an electromagnetic solenoid 1A into a nozzle housing 11, and a nozzle valve 15a for switching an injection nozzle 16 is formed at the shaft 15. The base end of the shaft 15 is extended into the yoke 9 of the solenoid 1A, a groove 15h is formed on the base of the shaft, and a coil retaining ring 31 for retaining a coiled spring 21 for energizing a return valve 18a is engaged with the groove. A disc 32 is mounted at the other groove 15i with the movable allowance, and the disc 32 and a support disc 33 are fixed to the movable yoke. Since the ring 31 and the disc 32 are engaged with the groove, the mounting strengths of the ring 31 and the disc 32 are enhanced. The inclining allowance angle of the shaft 15 is decided according to the dimensional relationship between the discs 32, 33 and the shaft 15.