Historically, various techniques to correct the deformity of lip and nose in functional and esthetic ways were developed and applied in dealing the patients with cleft lip. When treating the patients with unilateral cleft lip, many surgeons adopt the rotation advancement method originally developed by Millard, or the triangular flap technique developed by Tennison, Randall or the modifications of these techniques. Among these, triangular flap technique has its advantage in designing the flap using the patient’s anatomic landmarks. It enables less skillful operator to perform this technique relatively easily and produce reasonable results. In this report we present 8 cases of unilateral complete cleft lip and 3 casesof unilateral incomplete cleft lip. They all underwent primary cheiloplasty based on triangular flap technique, and functional, esthetic outcomes were favorable.