The invention relates to a leg supporting aid comprising, in plan view, a main body having a longitudinal direction (L) and a transverse direction (Q). The longitudinal direction (L) has a larger extension than the transverse direction (Q). The main body has at least three elevation portions (10, 11, 12, 13, 14) and at least two support portions (20, 21, 22, 23). Each of the support portions (20, 21, 22, 23) is arranged, in the longitudinal direction of the main body, between two elevation portions (10, 11, 12, 13, 14) which are interconnected by the corresponding support portion. The elevation portions (10, 11, 12, 13, 14) are coplanar. The support portions (20, 21, 22, 23) have different heights relative to the adjacent elevation portions (10, 11, 12, 13, 14). The elevation portions (10, 11, 12, 13, 14) and support portions (20, 21, 22, 23) are integrally formed and thus form the main body.