This article on the relationship between life quality and religious changes of students and analyzes influential factor. The society of the research includes all students in three public universities in Mazandaran province. The sample size is 445 students who were selected through stratified random sampling. Research findings show that the vast extent of the two concepts: quality of students’ lives and religiosity of students did not allow researchers to accept or reject a hypothesis, or to come to a consensus. Therefore, it is not possible to consider a simple and one way relationship between the stated variables. To come to a real and precise relationship, all indicators and dimensions of the subject should be taken into account. The coefficient of relation between the quality of students’ lives and religiosity of students is positive which approves the study hypothesis. However, this relationship could not be found in sub dimensions of the variables being studied. The relationship between physical quality of life on two extremes, very high and low, and students’ attitude to religiosity was negative.