Housing for an infusion pump cartridge (20), the housing being adapted to enclose a glass vessel (50) having an open proximal end (50a) closed by a slidable piston (51) and a distal end (50b) provided with a neck. The housing (30) is made of plastic material. The proximal end (31) of the housing (30) is provided with a pair of bayonet fitting formations (21), integrally formed on the housing (30) and adapted to enable the cartridge to be fastened to an infusion pump (10), and with connection means adapted to be arranged at the distal end (50b) of the vessel (50) for connection to an infusion set. The housing (30) consists of a cylindrical base part (33), which is provided with an inner flange (38) for abutment of the vessel (50) and on which the fitting formations (21) are formed, and a neck part (35) that can be fastened to the base part (33) by means of snap fitting formations (36, 37) for retaining the glass vessel (50) between the base part (33) and the neck part (35) of the housing (30).
