A removal member for removing a needle protective cap includes a housing having a longitudinal axis and receiving the cap along an insertion direction, the housing having a first support area and a second support area the first area being carried by a blocking element, movable relative to the housing between a cap insertion configuration, in which the orthogonal projections of the first and second areas in a transverse plane substantially perpendicular to the longitudinal axis are separated by an insertion distance, and a cap blocking configuration, in which the first and second areas are located in separate transverse planes, and in which the orthogonal projections of the first and second areas in said transverse plane are separated by a blocking distance less than the insertion distance and adapted to block the translation of the cap relative to the removal member in a removal direction opposite to the insertion direction.
