The present work considers Child Sexual Abuse (CSA) as a complex problem in which the educational institution constitutes a primordial space to carry out strategies of prevention and detection. A review is made on the conceptualization of the CSA and the obstacles that the teachers show for its approach. Then we introduce ourselves in the detection of abuse through the story of the victims, and the psychic and physical indicators. Likewise, possibilities of intervention in the educational field and prevention linked to teacher training and affective-sexual education programs are indicated. Aiming to an optimal and co-responsible approach to the prevention, detection and intervention of child sexual abuse, it is imperative the need to build channels of communication and articulated work between the education system and other organizations that deal with the defense of the rights of children and adolescents.