The invention relates to medicine, namely to traumatology and orthopedics, and can be used for imparting and reliable fixation required angle of bending in knee joint during operation total endoprosthetics of knee joint.Effect utility model consists in optimization of conditions of operation total endoprosthetics of knee joint, namely : - in the course of surgical intervention for better observation and surgical treatment of bones and all parts of knee joint possibility set the required angle bending in knee joint, up to maximum possible, and reliable fixation of the lower extremity in such position for long time; - possibility of attraction of a smaller amount of assistants during operation; - reduced financial costs for service material and maintenance of equipment.Result of the utility model, namely is the and reliable fixation required angle of bending in knee joint during operation total endoprosthetics, is achieved due to the, that body is made of two hollow pipes, connected between each other by transverse bars; on opposite ends of body are made pair of legs; each pair of legs is connected supporting platform concave for placing in it support part lock.