Celiac disease (CD) and Crohn’s disease (CrD) both involve inflammation of the gastrointestinal lumen, with environmental, genetic, and immunological factors playing roles in their pathogenesis. The prevalence of celiac disease in patients with CrD ranges from 0% to 14%. Some studies have found an increased coexistence of these two diseases, both of which have an autoimmune background. In this article, we present a case of a patient who presented with chronic diarrhea and was diagnosed with both CD and CrD at the time of admission.