To introduce a surgical technique, "pound-shape silicone oil retention suture in aphakic eye with intact iris." A retrospective analysis of medical records was performed. Each patient had an aphakic eye with intact iris and received the pound-shape silicone oil retention suture during vitrectomy combined with silicone oil injection. In the four patients who received the pound-shape silicone oil retention suture, the silicone oil was confined behind the suture for 3 months to 7 months without prolapse into the anterior chamber. Increased intraocular pressure was not observed in any patient, although peripheral iridectomy was not performed. Pound-shape silicone oil retention suture is a simple and effective surgical technique to prevent silicone oil prolapse into the anterior chamber.