The present research work entitled "Level of smartphone dependence and intrafamily relationships in students. IES Santa Rosa. Puno. 2023"; had as general objective: To determine the relationship between the level of dependence to the smartphone and intrafamily relationships in students. IES Santa Rosa. Puno. 2023. The research developed is of basic or theoretical type; of correlational level or scope; of non-experimental design and cross-sectional. The method used was the deductive hypothetical method. The study population consisted of 1002 students; in which a probabilistic sample of 278 students distributed among the five grades was considered. The survey was used as a technique and the Mobile Dependence Test (TDM) and the Intrafamily Relations Evaluation Scale (E. R. I.) as instruments. SPSS version 25 software was used for data processing and the RHO Spearman test statistic was used for hypothesis testing. The results show that the level of dependence on smartphones has a high significant negative relationship with intrafamily relationships in female students, with a significant negative relationship with intrafamily relationships.