We present the findings in two patients in whom sarcoidosis was manifested by bloody ascites. Granulomas were present on peritoneal surfaces in one case and on the serosal surface of the spleen and liver in the other. Five patients with abdominal sarcoidosis have previously been reported with nonbloody ascites. Although bloody ascites due to sarcoidosis is rare, it is presumably akin to bloody pleural and pericardial effusions which have been previously reported. The long-term prognosis of patients with peritoneal sarcoidosis and ascites appears good.