To increase the productivity of a strut type shock absorber.

This strut type shock absorber 1 comprises a tubular outer shell 3 incorporating a damping force generating mechanism, a tapered part (knuckle mounting part) provided for fitting the outer shell 3 to a knuckle 20 and inserted into a fitting hole 21 of the knuckle 20, and a screw part 35 projected downward from the bottom part 31 of the outer shell 3 through the fitting hole 21 of the knuckle 20. The knuckle 20 is tightened to the outer shell 3 through a nut (tightening member) 22 threaded to the screw part 35.