This study was conducted to investigate the influence of the psychological environment on the psychosocial maladjustment in early adolescence. This study also examined how the psychological environment influenced early adolescents in internalizing and externalizing their problems. Four hundred and eight students from three middle schools in Seoul participated in this study. The participants were divided into two groups by gender, and their psychological environment and psychosocial maladjustment were measured. The data were analyzed using ANOVA and multiple regression. The results of this study are as follows: Mutual intimacy and respect in the psychological environment affected internalizing and externalizing problems among male students; whereas communication affected internalizing and externalizing problems among female students. Based on this analysis, theoretical basics were presented for educational programs to prevent internalizing and externalizing problems.