The M-U-abdominoplasty introduced here has been developed to generate an even tightening of the central and the lateral parts of the abdominal wall. In contrary to the standard method, a more pronounced accentuation of the waist and an aesthetically more advantageous course of the scars can be achieved. Application of the M-U-abdominoplasty is especially recommended in cases of previous liposuction or undermining of the abdominal wall, resulting in a stronger relaxation of the lateral than the central parts. A stressed tightening of the lateral abdominal wall can be achieved by a soft coursed, M-shaped, cranial incision line, which is united with a broad U-shaped caudal incision line. The length of the U-incision determines the length of the M-shaped incision. Only a limited undermining of the abdominal wall above the umbilicus is needed, which minimises the risk of wound-healing impairment caused by nutrition defects.