Objective To study the results of photocoagulation in early retinoblastoma （RB）. Methods This was a retrospective case series study. Four photocoagulated patients， including 3 males and 1 female， who were classified as A stage were analyzed. The youngest was 2 months old； the oldest was 1 year old. One patient had a family history. The follow-up period was 6 to 12 months. The tumors were more than 3.0 mm to the fovea and more than 1.5 mm to the optic nerve in the 4 patients. No vitrous and subretina implantation. The diameters of tumors were 3.0 mm or less. Results RB in all patients regressed. Conclusion Photocoagulation is effective in treating A stage RB.