Abstract: A femoral hip prosthesis and a stem therefor comprising a femur end to be received in the femur and a head end for connection to a hip head, which stem is provided for medial support on the public arch (S.sub.1) with a curved, smooth medial stem support part, is provided for lateral support on the lateral cortex (S.sub.2) with a lateral stem support part, and is provided for lateral support on the greater trochanter (S.sub.3) with a lateral comb-like stem support part located between the lateral stem support part and the head end and comprising a number of combs, the combs connecting onto the lateral side protruding laterally relative thereto, and which stem is provided on the ventral and dorsal sides at the point of the metaphysial portion with at least one groove which consists of groove portions converging in the direction of the head end and enclosing an apex.