Introduction and Purpose: The present study clinically evaluated the success rate of formocresol pulpotomy in the primary molars of children referred to the pediatric department of Shahid Dental Faculty from 2002 to 2005 Methods: The present cross-sectional study was conducted among all children treated with formocresol by pulpotomy and responded positively to the call for re-examination. The required data were obtained from the patient's medical records and 67 patients were rejected. The collected data were analyzed using descriptive statistical tests such as dispersion indices, frequency percentages, and correlational tests. Results: 67 examined patients had 141 teeth pulpotomy. In the remaining 106 teeth, 6 cases of fistula, 2 cases of impact sensitivity, and 5 cases of pain were observed. Clinical success was observed in 123 teeth (82.2%) and clinical failure was observed in 18 teeth (12.8%). The total restored cases were 139 and 2 cases of pulpotomies were not restored (P<0.6-2). In addition, concerning the materials related to clinical failures, most cases were related to fistula, which included 6 cases (30%) of the cases.