Inappropriate sexual behaviors may be observed in individuals with intellectual disabilities (ID), especially during adolescence. There are several undesired consequences of exhibiting such behaviors in public spaces, such as schools. The competencies and attitudes of special education teachers, who are responsible for the education of individuals with ID, are of significant influence. This study was conducted to investigate the views of special education teachers working with adolescents with ID on inappropriate sexual behaviors exhibited in educational settings. Accordingly, semi-structured interviews were conducted with 12 special education teachers. The phenomenological research design, one of the qualitative research methods, and thematic analysis were used in this study. Five themes were identified after the analysis of the findings of the study, namely, common behaviors, teacher attitudes, teacher competencies, teacher interventions, and educational content. The findings were discussed on the basis of the relevant studies in the literature and a number of conclusions were reached. Accordingly, the inappropriate sexual behaviors that special education teachers encounter the most frequently are masturbation, undressing, and touching, and when these behaviors are exhibited aggressively, teachers have difficulty in intervening. Participants regard themselves to be incompetent in terms of sexual education and consider relevant educational content inadequate.