Thigh prosthesis

A prosthesis element for a thigh prosthesis with a shaft (24), which can be inserted into the upper end of a femur, with an inclined transverse support plate (26), which is fitted to the upper end of the shaft (24) and projects beyond the upper end of the shaft (24) on all sides, and with a support post (28) inclined in the medial direction, which is supported by the support plate (26) and onto which a condyle (22) can be fitted, wherein the shaft (24) comprises an upper, proximal shaft section (40) and a lower, distal shaft section (30), the main surfaces of these two shaft sections (30, 40) being tilted relative to one another through an acute angle (b) in such a manner that the line of intersection between the two main surfaces of the two shaft section (30, 40) extends substantially in the lateral direction wherein the shaft section (30, 40) comprise a non-circular cross-sections, taper in the direction from proximal to distal and at least one shaft section comprises a lower section (42, 44) that is twisted about the longitudinal axis of the at least one shaft section.