The goal of treating patients with gastric cancer is based on complete surgical resection of the tumor and its lymphatic drainage. Postoperative adjuvant chemotherapy shows no significant prognostic advantage. Several studies of preoperative adjuvant chemoradiotherapy have shown the benefits of downstaging and improving the ratio of R0 resection. However, there is no data concerning the comparison of preoperative with postoperative adjuvant chemoradiotherapy. We report a 42-year-old woman with advanced gastric adenocarcinoma who received 5-fluorouracil, leucovorin and cisplantin-based chemoradiotherapy followed by surgery. Remarkable tumor reduction was observed in the primary tumor and metastatic paraaortic lymph nodes. Neoadjuvant chemoradiotherapy for this patient was effective in achieving the goal of cytoreduction.