Four lesions in three patients with so-called vanishing tumor of the stomach are described. Two patients had one lesion each and the third patient two lesions. The lesions were localized in the gastric cardia, angle, and antrum. Radiological findings of these tumors showed a round tumor with smooth surface and regular margins. The edges of the tumors were gently sloping, while the mucosa surrounding the tumor was edematous. The time interval until these tumors disappeared was five days, 20 months, 12 months and seven months, respectively. When the soft appearance of a gastric tumor is suspected in UGI examination, the patient should be re-examined after a month or more, to avoid unnecessary surgery.