ErikaKumalasari, Imelda2014-05-212014-05-212014-05-21978-602-18936-0-9wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/6282Diarrhea is more dominant because it attacks the immune toddlers `who are still weak, so toddlers are particularly vulnerable to the spread of the bacteria that causes diarrhea. There are risk factors that affect the frequency of diarrheal disease in infants. The risk factors include nutritional status, environment, and parenting parents. The purpose of this study was to determine the risk factors relationship with the frequency of diarrhea in children under five health centers in the region of Siak. This study is a quantitative study using cross sectional approach. The research was conducted in the region of Siak health center in July 2012. The population in this study were all parents who have children in the region of Siak Health Center until July 2012. The sampling technique in this study by using Simple Random Samples with a sample of as many as 96 people. The result of the chi-square test statistic showed that there is a significant relationship between nutritional status (p = 0,000), enviromental (p = 0,000) and parenting parents ( p = 0,008) with the frequency of diarrhea in infants in the work area of Siak Health Center 2012. Mothers be expected always examined the health status of children under five to Posyandu or nearest health centerennutritional statusenvironmentparentingdiarrheaUR-Proceedings