The invention relates to an orthopedic knee joint, comprising an upper part(2), on which upper connecting means(20) are disposed, a lower part (3) pivotally supported on the upper part (2),connecting means for orthopedic components (4), anda stop () for delimiting an extension movement, wherein the stop (7) isconfigured displaceably and coupled to an adjusting device(64), which is coupled to a control device (6), which actuates the adjustingdevice (64) as a function of sensor data and changesthe position of the stop (7).