Inclusion Criteria:  Pathologically diagnosed as gastric adenocarcinoma Imaging scans or diagnostic laparoscopic findings suggestive of peritoneal metastasis HER-2 negative tumor Laboratory tests adequate for chemotherapy (within 2 weeks of enrollment) Absolute Neutrophil Count: ≧ 1,500/mm³ Hemoglobin level: ≧ 8.0g/dL Platelet Count: ≧ 10×104/mm³ AST (GOT), ALT (GPT): ≦ 100U/L Total Bilirubin: ≦ 2.0mg/dL Creatinine Clearance (CCl): ≧ 50mL/min ECOG 0 - 2  Exclusion Criteria:  Patients with other major medical disease or malignant tumors other than gastric cancer Contraindication to 5-FU, Oxaliplatin, Leukovorin or Paclitaxel Pregnant, breast-feeding women or with birth plan History of gastrointestinal surgery Patients refusing treatment