PROBLEM TO BE SOLVED: To provide an injection cylinder and the like having further excellent visibility of a needle tip and an affected part compared with conventional lure lock type injectors and the like, capable of reliably fixing an injection needle substantially equally to cases of the conventional lure lock type injectors, and hardly causing fall-out and removal in use.SOLUTION: An injection cylinder 1 includes: a cylinder body 2 having an inner space in which a piston is inserted, formed therein and fixing claws 4 provided on the cylinder body 2 for fixing an injection needle. The pair of fixing claws 4 are disposed at positions symmetric about the cylinder body 2. The respective fixing claws extend from the outer peripheral surface of the cylinder body 2 outward the cylinder body 2, and are formed into a substantially L shape bending towards the tip end direction of the cylinder body 2. A screw thread for fixing the injection needle is formed on a surface facing the outer peripheral face of the cylinder body 2.
