A joint device is disclosed for use as a prosthesis in a human or animal body. The joint device comprises a T-shaped member having a transverse pin fixedly connected to a column member and a pair of transverse sleeves configured to receive the pin and allow the pin to rotate about its longitudinal axis within the sleeves. The sleeves engage a bore in a first bone and the column member is coupled to a second bone so that the first and second bones are pivotably interconnected by the joint device. The sleeves are compressible so as to allow multi-directional movement of the bones in the joint.