The excessive use of Smartphone in young people has caused deterioration in family relationships. The objective of the research was to determine the relationship of the use of the Smartphone with family relationships in university students. The hypothetical deductive method was applied, the research is of a correlational descriptive type, a non-probabilistic sample was used for the convenience of 96 students, the survey technique was applied and as a Likert type questionnaire with 36 items raised by variables, dimensions. and indicators. The results showed that there is a relationship between the use of the Smartphone with family relationships, evidencing the deterioration of the face-to-face interaction between parents and children, poor compliance with family functions of socialization, recreation and affection that young people lack and the communication styles they practice at home a...