Gastric cancer is one of the most frequent gastro-intestinal neoplasia. The prognosis of this disease is correlated with tumor stage, surgery being the only method which offers an important improvement in survival rate. Even after curative intent surgery, some patients develop peritoneal carcinomatosis, being the most frequent modality of relapse in these cases. Performing peritoneal cytology during diagnostic laparoscopy, especially in T3 cases, might modify therapeutic strategy of those cases.