The cap (12) (10) that the present invention relates to a kind of for injection device. The injection device includes body, for keeping the syringe needle of syringe from its end. Cap is removably attached to main body. Lid includes that actuator (23) and needle (22) cover the needle. Nut cap further includes one and is coupled in actuator and shield. The main body rotation that moves axially away from that connector is configured to be connected to the actuator of ontology injection device when lid makes needle relative to main body.
