Leg prosthesis

A leg prosthesis, comprising a prosthesis shaft (5) including an integrated prosthesis shaft adapter (2), transtibial part (6) with a foot or with a foot and a knee joint assembly (7),

• wherein the prosthesis shaft adapter (2) is constructed as a compact one-part component for establishing a fitted connection between the prosthesis shaft (5) and the transtibial part (6), and including an integrated amputation stump receiving cup (8) with a connection mechanism and/or locking mechanism for a liner and with an integrated rearward extension (A), relative to the walk direction, on a walk line (12) of the walk direction or on a walk line (11) which is parallel thereto with a lateral offset (B),
• wherein the effective rearward extension (A) from a center line (9) of the amputation stump receiving cup (8), at a right angle to the amputation stump cup surface, to the center of a prosthesis receptacle connection (10) for the transtibial part (6) is dimensioned from 1 cm to 10 cm, and
• wherein the prosthesis receptacle connection (10) for the transtibial part (6) is constructed such that the centerline of the attached transtibial part (6), with or without a knee joint assembly (7) screwed thereto, extends with respect to the cup centerline (9) and an imaginary vertical alignment line (3) from the hip joint (1) to the midfoot (4) at an acute angle α from 5° to 20° thereto.