Rotavirus, is the most common cause of severe gastroenteritis related death. Clinic varies f rom asymptomatic inf ectionto severe diarrhea. In this study, children aged 0-16 years who admitted because of gastroenteritis were investigated f or rota- virus antigen positivity and the relationship of positivity with demographic data is evaluated. The presence of rotavirus anti- gen were investigated using an immunochromatographic method. In 211 of the 1,168 stool samples positivity f or rotavirusantigen was detected. Frequency was signif icantly increased in the f irst two years of lif e (37.4 %) and in winter (28.90 %).Rotavirus is an important cause of gastroenteritis especially in children ≤ 2 years of age and in winter and should be investi- gated routinely.