This study attempts to depict the secondary school eighth grade students' epistemological beliefs and their critical reading in terms of several variables and to examine the relationship between them. Descriptive and relational survey models were used within the scope of the study. The population of the study consisted of the secondary school eighth grade students studying in Istanbul. The participants were selected by convenience sampling method. The study deployed personal information form, scientific epistemological belief and critical reading scales. Descriptive statistics, multivariate analysis of variance (MANOVA) and correlation analysis were used during data analysis. The study results concluded that the eighth grade students' epistemological beliefs and their critical reading levels were at a moderate level. While no significant difference was identified across the students' epistemological beliefs in terms of their gender, academic achievement, socio-economic level and book reading, a significant difference was noted across their critical reading levels in terms of gender, academic achievement and book reading, but that was not the case for their socio-economic level. The results of the research have useful implications for teachers. While teachers develop students' epistemological beliefs in the teaching environment, they will also develop their critical reading skills.