The invention relates to an artificial hip joint, in which the surfaces of both the socket and the ball of the joint are in the form of rotational bodies (rotational surfaces) deviating from the normal spherical shape. The rotational surfaces are in the form of Pascal's curve or screw rather than being spherical. In addition, provision is made such that an angular deviation .alpha. is present between the axis of the femoral throat of the thigh and the rotary axis of the ball of the joint when viewed from the top, such deviation preferably equal to 10.7.degree..+-.3.degree..