Emotional distress, such as symptoms of anxiety, depression, and withdrawal, is on the rise among teenagers today. These symptoms are generally grouped into internalizing problems. Based on research, a risk factor that contributes to internalizing problems is peer rejection. This study aims to determine the effect of peer rejection on adolescent internalizing problems. Research design is quantitative research with a multistage random sampling technique as a data collection technique. The subjects of this study were 252 adolescents aged 16-18 years who are currently studying in SMA in Bondowoso Regency, consisting of 103 boys (M = 40.068; SD = 13.283) and 149 girls (M = 40.893; SD =13.283). The instruments used were Social Peer Rejection Measure (21 items, α = .90) and Strengths and Difficulty Questionnaire (SDQ), just for internalizing problems (10 items, α = .72). The results of the analysis test using simple linear regression showed that there was a positive influence of peer rejection on internalizing problems in high school adolescents in Bondowoso Regency, adjusted R 2 = .278; F(4, 427) = 251, p = .000). This influence shows that the more often adolescents experience rejection from their peers, the higher the chances of experiencing internalizing problems.