Thirty-three patients with advanced measurable gastric cancer were treated with a combination of mitomycin C and triazinate. Twenty-nine of these patients had failed prior chemotherapy. Nine patients (27%) had an objective tumor response (median duration, 10 weeks). Median survival of all patients treated was 21 weeks. This study demonstrates that carefully selected patients with advanced gastric cancer who have failed a trial of chemotherapy, but are still ambulatory and maintaining adequate nutrition are appropriate subjects for studies of new treatment regimens. Based on the observed objective tumor response rate and median patient survival, further studies of these drugs in combination for the treatment of advanced gastric cancer are indicated.