The reconstruction of the female breast after mastectomy has become a crucial part of primary breast cancer therapy. Setting of an implant is possible only in case of locally abounding soft tissue coverage and when no radiation has before performed. It is necessary a complete integrity of the submuscolar pocket and good blood supply of the skin to avoid failure of the procedure. In Author's experience, started since 1994, an immediate breast reconstruction after mastectomy is performed using gel-silicon implants directly when it was possible or setting first an expander. In six cases the condition of major pectoralis muscle after mastectomy was so foul that an immediate breast reconstruction with prosthesis was not realizable. However, the Authors tried a new technique using polypropylene mesh sutured on the major pectoralis muscle to cover the muscle partially destroyed. Preliminary data from the 6 pts seems to be encouraging.