A passive artificial limb (1), comprising: a socket (3) arranged at a first end (4) of the prosthetic limb (1) and exhibiting a shape designed to abut a stump (5) of a subjects limb, a terminal part (7), optionally shaped as a hand or a foot, arranged at a second end (8) of the passive prosthetic limb (1) opposite the first end (4), a connecting part (6) interposed between the socket (3) and the terminal part (7) the connecting part (6) comprising at least an adjusting device (10) configured such as to vary at least an moment of inertia of the passive prosthetic limb (1) with respect to at least a reference axis.
