Hemoperitoneum after inguinal hernia repair, with the exception of laparoscopic herniorrhaphy, is extremely rare. No other case of hemoperitoneum after traditional open inguinal hernia repair has been reported in the English-language literature. A 39-year-old woman had undergone inguinal hernia repair with the Bassini repair technique. Lower abdominal pain and anemia occurred on postoperative day 1. Laparoscopy was performed and revealed hemoperitoneum caused as a complication of inguinal hernia repair. The abdominal cavity was thoroughly washed with saline solution, and the aspirated blood was processed and reinfused. Laparoscopy for hemoperitoneum as a complication after inguinal hernia repair was very useful for both diagnosis and treatment.