Our breast quadrantectomy operative procedure and the clinical results are reported. We have peformed this method in 19 patients with stage Ⅰ and Ⅱ breast cancer under general anesthesis. A negative margin of cancer was confirmed by intraoperative histological exami-nation. Our method of quadrantectomy was performed without sturing both cut edges, which allowed intestitial fluid to collect. Of nineteen patients operated using this method, 17 were satisfied with the cosmetic results. Burn and infection were the causes of deformity of the preserved breast. Tight adaptation of the skin suture, avoiding burns due to elecrocauterry and suturing of the residual duct are recomended procedures for satisfactory results.