The invention relates to an automatic injection device including a container provided with a needle a housing receiving a container movable relative to the housing between an initial position to an insertion position a needle shield for receiving the needle and in which the needle is embedded prior to use of the device and a deshielder coupled to the needle shield by a first connecting arrangement and removably assembled to the distal part of the housing by a second connecting arrangement. The first and second connecting arrangements are designed so that a rotational movement of the deshielder about the device axis of the device with respect to the housing causes an axial displacement of the needle shield in the distal direction with substantially no rotational movement of the needle shield with respect to the needle.
