Background: Family and parents’ supervision and performance affect the proper socialization process of adolescents and their behavioral development. Therefore, this qualitative study was conducted to examine the family factors affecting violence in adolescents. Materials and Methods: This qualitative study was conducted using the conventional qualitative content analysis method in 2017 in Roodsar. Data saturation was obtained with 50 individuals using 4 questions. The data were collected using in-depth interviews with purposive sampling among female primary and secondary school students as the main participants of the study and their teachers and family as contributors. All interviews were recorded and then typed. Data analysis was done continuously and simultaneously by collecting data using Lundman and Graneheimm constant comparative method. Results: Data analysis was conducted using the conventional qualitative analysis method resulted in the extraction of 357 primary codes, 21 sub-sub-categories, 4 sub-categories, and one main category. At the end of this stage, the family factors affecting the violence of adolescents in the whole family provided insecurity to the adolescents, and an insecure family was defined according to the findings as follows: "a broken family with incorrect parenting practices and open borders that provide an insecure environment for the student and lead to violent behavior in adolescent". Conclusions: According to the results of this study family factors are related to adolescent violence. Regarding the independence of adolescents at this age and the role of other socializing formal and informal institutions that affect adolescent behavior, the strong and influential role of the family on adolescent behavior is quite obvious.