The invention relates to a needle interface (2) for connecting a hollow needle (3) having a proximal tip (3.1) to a medicament reservoir (1), the needle interface (2) comprising an inner ring (5) fixed to a reservoir wall (4) of the reservoir (1) and an outer ring (6) attachable to the needle (3), wherein one of the inner ring (5) and the outer ring (6) comprises at least one magnet (6.1) and wherein the other one of the inner ring (5) and the outer ring (6) comprises a magnetisable material (5.1) or a magnet (6.1).
