Violence among children is becoming more frequent every day. It is described as repeated and persistent exposure to negative actions by one or more students. (Olwues, 1998) Although most people think of physical violence at the mention of violence, it should be emphasized that violence also includes verbal (teasing, gossiping, making embarrassing jokes) and sexual harassment. Violence leaves great and lasting consequences on the victim and can be psychosocial, physical and emotional. They can seriously jeopardize a victim’s quality of life, even after she grows up. For this reason, it is very important that the school and its employees respond in a timely and proper manner. Many programs for the prevention of violence among children have been launched in schools in Croatia. It is important that teachers and professional associates notice the problem in a timely manner and that they know how to react properly. Also, the school and parents need to work together because only by working together can they create a safe environment for children. It is important that children are shown the problem of violence and how to prevent it in school as well as in the parental home. The aim of this paper is to draw attention to the problem of violence among children and emphasize the importance of preventive action at all levels - family, school and at the level of the immediate and wider community