Abstract: Needle module for puncturing skin in a reciprocal manner. The needle module includes a needle unit, a housing and a biasing mechanism. The needle unit includes a needle. The needle unit is movable with respect to said housing between an extended position wherein a distal end of the needle extends from a distal end of said housing and a retracted position wherein the distal end of the needle is positioned within the housing. The biasing mechanism is arranged for urging the needle unit towards the retracted position. The needle module further includes a limiting mechanism. The limiting mechanism is arranged for limiting the relative movement of the needle unit out of the distal end of the housing to a maximum extension distance when moving towards the extended position. The maximum extension distance is 1.5 mm or less.