Peritoneal pseudomyxoma, also called gelatinous disease of the peritoneum is a rare entity that corresponds to diffuse peritoneal infiltration, consisting of mucinous ascites and multifocal mucinous epithelial implants. Its prevalence is 2 cases per million populations [1]. Peritoneal pseudomyxoma may remain asymptomatic, discovered during laparotomy. CT scans are the most specific diagnostic tool. The appendicular origin of gelatinous ascites is the most common and represents 90% of causes. Mucinous tumours of the ovary are a very rare cause. We report the case of a 55- year-old woman with a peritoneal pseudomyxoma of ovarian origin [2].