Fungal gastric ulcer is a relatively frequent from of gastric mycosis coexisting in 20-30% of cases with peptic ulcer. In such cases fungi were present in patients without other disease and in those with concomitant diseases such as neoplasms, polyps of the stomach, haematological diseases, and in patients treated with cytostatics and H2-blockers. Fungal ulcer differ from common ulcers in greater size and tendency for bleeding. In certain situations "fungal ulcer" requires routine antimycotic treatment especially if operation is planned.