An implantable device (1) for injecting and/or drawing fluid having a housing (2) with a chamber (2A) formed therein. The housing (2) includes a proximal wall (4) and a distal wall (5) between which a side wall extends, and an aspiration zone (7) designed to be perforated by a hollow needle for injecting and/or drawing fluid into the chamber (2A). The aspiration zone (7) extends simultaneously on the proximal wall (4), the side wall and the distal wall (5). The device (1) has a shield (13) made of a material not perforable by a hollow needle inside the chamber (2A) to prevent the housing (2) from being perforated by a hollow needle.