The research aims to identify the effectiveness of the play therapy program in modifying the behavior of the bullying child in the school environment. The research sample consisted of bullied primary school students and dependence on the bullying behavior scale. The semi-experimental approach was used in the research, and the experimental design was used in one group with a pre-measurement. After analyzing the results using appropriate statistical methods for the research variables, the results showed the effectiveness of the play therapy program in modifying the behavior of the bullying child in the school environment