The aim of this study is to investigate the relationships between attachment levels to school and the variables of the perception of school life quality and peer pressure among high school students and whether school life quality and peer pressure predict students' attachment levels to school significantly. The relational screening model was used in the research. The sample group for the research comprised a total sum of 1533 high school students from 12 different high schools in six counties in Hatay province in Turkey. Sample of the study was selected using purposive and easily accessible sampling. "School Attachment Scale Among Children and Adolescents (High School Form) (SASACA)," "The Quality of Life in High Schools Scale (QLHSS)" and "Peer Pressure Scale (PPS)" were used as tools of data collection. A Pearson Correlation analysis was performed to determine whether there was a significant relationship between the scores of the scales used in the study. Considering the findings of the study it was found out that there was a significant and positive relationship between the levels of students' attachment to school and school life quality. In addition, a high level, negative and significant relationship was found between the level of students' attachment to school and peer pressure. Peer pressure and school life quality are significant explanations of the level of attachment to school.