Mucormycosis has emerged as an important opportunistic fungall infection in diabetics and other immunocompromised hosts. Rhinosinusitis, pansinusitis, rhino-orbital and rhinocerebral are the common classical manifestations of mucormycosis. However, primary gastrointestinal (GI) mucormycosis is an uncommon disease associated with a high mortality rate. Reported cases of GI mucormycosis in an immunocompetent host are very few in the literature. Standard therapy for invasive mucormycosis includes parenteral amphotericin B (AMB) in combination with radical debridement of infected tissues. We report a 53-year-old man patient with gastric mucormycosis who had only diabetes mellitus and completely recovery after only amphotericin B treatment.