Penetrating rectal injury is relatively rare in children. Colorectal perforation is presumed a dirty wound in which local drainage and diversion colostomy should be considered in addition to primary repair. Laparotomy or laparoscopy as initial management has been recommended for those with intra-abdominal involvement. We presented a 5-year-old girl who accidentally sat on a long-handle spoon that penetrated into her anus and manifested with massive pneumoperitoneum. She was successfully managed by proctosigmoidoscopic transanal rectal repair with laparoscopic intra-abdominal drainage without a diversion colostomy. To simplify surgical procedures, a proctosigmoidoscope transanal repair is an option for the initial management of pneumoperitoneum-associated rectal impalement.