The aim of the study is to investigate the relationship between the peer relationships and loneliness levels of students who study in the sports high school. The study group of the study consisted of 9th, 10th and 11th-grade students who study in sports high schools in Elazığ between 2017-2018 years. Because there was a total of 145 students, no sampling method was adopted and it was attempted to reach all the students in the population. As a result, the study was conducted with the data collected from 132 students. In the study, the UCLA Loneliness Scale short form and Friendship Qualities Scale were used as the data collections tool. In the data analysis, SPSS package software was utilized. As a result of the study, it was observed that the mean loneliness scores of males were higher compared to females and the mean peer relationship scores of females were significantly higher compared to males. The mean loneliness levels and mean peer relationship scores of the students did not differ depending on their grade of education. Additionally, it was determined that there was a negative and significant correlation between peer relationship and loneliness and peer relationship significantly and negatively predicted loneliness