The invention relates to a prosthetic joint which can be used as an artificial knee. Said prosthetic joint consists of a knee upper part (1), a knee lower part (2) and a fixing element (8) connecting said two parts. The knee upper part is rotationally arranged about the rotational axis (4) of the fixing element and rotation occurs counter to the force of an elastic element (17) which is arranged in knee lower part. Detachable fixing means (7), which are used to fix at least one rotational position, are provided between the knee upper part and the fixing element.