Abstract : Carcinoid tumors mimicking acute appendicitis are rare (0.43% of patients), and the prognosis is excellent in the non-perforating appendix. The treatment depends on the site, size, and degree of mesoappendix and lymphovascular invasion. The level of Ki67 and mitotic activation rate are vital. Thus, it is important to follow the pathology report. We presented a case of tubular carcinoid mimicking acute appendicitis.