This research used a quantitative approach aimed to investigate factors affecting educational opportunities among children after they finished the compulsory primary school level. Secondary data collected by the Population Studies Centre at the National University of Laos were analyzed. 498 people who live in the poorest area of the Sangthong district were the research samples. Logistic Regression Analysis was employed for investigating the relationship among demographic, educational and economic variables and educational opportunity among children Findings from Model I, which was analyzed to find influential factors of educational opportunity among sons, showed that the education of the father and the mother were the main influential factors. If a son’s parent had finished a primary level of education, the son was more likely to have an opportunity for getting a higher education than those born of uneducated parents at a statistical significant level .05. Findings from model II, which was done to find influential factors of educational opportunity among daughters showed that the age of the father, household income, a preference for a daughter and the education of the mother were important factors. Older fathers and a greater household income statistically increased an educational opportunity for daughters. Parents who had no sex preference statistically generated more chance for their daughters to get a higher education. In terms of the education of the mother, sons of mothers who were educated through the primary level were more likely to have an opportunity for getting a higher education than those of uneducated mothers at statistical significant level .05. Findings from the research lead to suggestion that the Lao government and concerned educational agencies should provide and guarantee equal educational opportunity among children, especially for girls, in order to eliminate gender inequality and provide equal educational opportunities, especially in the poor areas of Lao P.D.R.