Abstract: The invention relates to a bone marrow aspiration trocar comprising an element in the form of a hollow needle, the end of said element being provided with a prehension body (20) having a handle with lugs (4), and an insertion end (22). According to the invention, said insertion end (22) is closed and has lateral aspiration holes (21), whereas the other, prehension end (20) comprises a housing (L) provided with a bottom surface (28) which is penetrated by a perforating rod (24), and used as a support, either for a removable lid (26) or a capsule which is under a vacuum (27) and has a sealed diaphragm (27a), for handling said trocar.