 Billroth-II gastrojejunostomy is one of major option after gastrectomy for gastric cancer. The investigators hypothesized that isoperistaltic anastomosis lead to higher incidence of dumping syndrome but antiperistaltic anisoperistaltic anastomosis have relevance to gastric stasis or obstruction. The investigators will assess complications, dumping syndrome and quality of life between isoperistaltic and antiperistaltic after distal gastrectomy for gastric cancer. 