This study was to investigate the influence of parent attachment, perception and attitudes about family mealtime on the smart phone addiction in adolescents. Study variables were attachment to father, attachment to mother, and perception and attitudes about family mealtimes. Middle school student in Seoul and Kyounggi province participated and total 596 questionnaire were analysed. SPSS WIN 18.0 were used in data analysis. As study results, significant factors influence on smart phone addiction were attachment to father, perception and attitudes about family mealtimes, frequence of family mealtimes, gender, grade, and use of SNS. These variables explained adolescents' smart phone addiction for 28.9% and perception and attitudes about family mealtimes were the variable which show the highest explanation. Smart phone addiction was higher as lower an attachment to father, as lower perception and attitudes about family mealtimes, as lower the frequency of family mealtimes, female student, 3rd grade, and as more use of SNS. It is suggested to develop programs and strategies to increase attachment to father, frequency of family mealtime and perception and attitudes about family mealtimes.