Living together without formal marriage, which is called cohabitation, has become popular in the world and also in our country in recent years. Cohabitation known as white marriage, domestic, biological couple, clinical. In the Oxford dictionary, it is defined as husband and wife living together. The main aim of the current research is to explain the attitude of students towards cohabitation, and also to compare the attitudes of male and female students using social learning theory, and to answer this question, what is the difference between male and female students' attitude of University Mazandaran towards cohabitation? The sample of this research is 246 students of University of Mazandaran. Simple random sampling method was used in this research. In this way, the online questionnaire was given to the research sample population without the researcher having any information about their attitude towards coexistence or their experience in the field of coexistence. Spss software was used for data analysis. The findings show that a total of 19.1 percent of the total sample are against and completely against cohabitation. The comparison between women and men also shows that 19.8% of women and 17.8% of men are against cohabitation. About half of the students also have an intermediate attitude (neither in favor nor against) towards cohabitation. The findings related to the difference in attitude towards cohabitation show that there is no significant difference between male and female students, but from the behavioral aspect, men have experienced cohabitation more than women. The results of multiple regression analysis show that the differential association variable affects cognitive and behavioral cohabitation. The variable of differential reinforcement has had a significant effect on cognitive, emotional and behavioral cohabitation and the variable of imitation has had a significant effect on emotional cohabitation. Also, the findings of the research show that the differential association in women has a significant effect on the (total) cohabitation, but it is not significant among men.