Mucormycosis is an opportunistic infection caused by the fungi of the Mucorales order of the class Zygomycetes. Gastrointestinal mucormycosis is an uncommon, fatal condition accounting for only 7% of the cases. We present the case of a gastroduodenal mucormycosis presenting as recurrent massive hematemesis. We report this case to alert clinicians of this rare but fatal condition and to encourage further research into its pathogenesis and management.