The variation of teeth number can occur at initiation phase of tooth development, the etiology is unclear but it be supposed by the excessive lamina dental activity. The supernumerary teeth can be single or multiple, at one side or two side, with conical, tubercle or normal form, undergo eruption or impacted, and with parallel or contrary direction of teeth development. The supernumerary teeth in incisive region is mesiodens. In this case report, the supernumerary teeth occured at mixed tooth period which it result in the tooth arrangement is bad. The mesiodens was extracted as the position of upper jaw central incisive teeth were corrected. The second supernumerary tooth with contrary direction was removed by surgery.