A needle protecting device on or for an injection apparatus comprising an injection needle with a needle tip and a needle base beyond which the injection needle protrudes, the needle protecting device including a needle protector moveable from an exposing position in which the needle tip is exposed to a protective position in which it overlaps the needle tip, a first blocking mechanism connected to or formed in one piece with one of the needle protector or the needle base, and a second blocking mechanism connected to or formed in one piece with the other of the needle protector or the needle base, wherein, when the needle protector is in the protective position, the blocking mechanisms are engaged with each other preventing the needle protector from moving into the exposing position, and wherein the engagement may be non-destructively released and/or restored.