1. An automatic injector (1) for introducing (M) dose of a liquid medicament, comprising: a tubular frame (2) carrying a subassembly comprising a tubular carrier member (7) mounted slidably relative to said frame (2) and partially located inside the frame (2), said supporting member (7) comprises a syringe (3) with a hollow injection needle (4), a drive spring (8) and the piston (9) in order to guide the load of the drive spring (8) on the stopper (6) of the syringe (3), wherein the syringe (3) is fixed with decree nym carrier element (7) for joint axial displacement, overlapping the cuff-initiator (12) disposed over the distal end (D) an automatic injector (1), wherein said cuff-initiator (12) extends at least almost over the entire length of the automatic injector (1), the control spring (19) disposed around the support member (7), the first locking means (20, 22, 23, 24) for connecting the proximal end of the control spring (19) or with the carrier element (7) to advance it from to introduce a needle or to the frame (2) to retract the needle, depending on the relative axial position of the carrier element (7) and the cuff-initiator (12), the second locking means (11, 13, 15), providing the possibility of release of the drive spring (8) for the injection, when the carrier element (7 ) is at least approximately reached the injection depth during needle insertion, the third locking means (16, 17, 18), providing the possibility carcass compound (2) with the carrier element (7) for joint axial displacement with respect to the cuff-initiator (12), this third Lockout
