An implantable device (1) for injecting and/or drawing fluid or an inflatable and/or deflatable compartment of a surgical implant, the device (1) comprising a hollow body (2) and a puncture wall (3) added to the hollow body (2) so that the hollow body (2) and puncture wall (3) delimits a chamber (4). The puncture wall (3) is transfixed by a hollow needle for injection and/or drawing the fluid into the chamber (4), the device (1) comprises a means for fixing (8) the puncture wall to the hollow body (2) so that the hollow body (2), puncture wall (3) and fixing means (8) form a single subassembly (9) and an enclosure (10) essentially covering the puncture wall (3).