A 72-year-old man with a suspected incarcerated right inguinal hernia was referred to our hospital. Laboratory data indicated the presence of inflammation. Abdominal computed tomography showed a fluid collection extending from the right scrotum to the abdominal cavity, a swollen appendix, and surrounding panniculitis. Emergency surgery was performed for appendicitis with abscess in a right inguinal hernia. Laparoscopic examination showed that the right internal inguinal ring was occluded by the cecum and terminal ileum. The root of the appendix was necrotic and perforated with abscess formation. Copious purulence drained from the right internal inguinal ring. Appendectomy was performed laparoscopically, and iliopubic tract repair was performed for the right inguinal hernia. Laparoscopic surgery was useful for diagnosis and treatment of appendicitis with abscess in a right inguinal hernia.