A knee joint prosthesis used for replacing the articulating knee portion of a femur and a tibia. The knee joint prosthesis includes a femoral component, a tibial component, a bearing member, and a soft tissue fixation mechanism. The tibial component includes a tibial bearing surface and an attachment mechanism which facilitates the coupling of the soft tissue attachment mechanism to the tibial component. The soft tissue attachment mechanism has an attachment mechanism which is operable to prevent movement of the soft tissue attachment mechanism with respect to the body. Further, the soft tissue attachment mechanism defines structures which facilitate the coupling of soft tissue to the knee joint prosthesis.