Research has shown that antisocial behaviour already develops in early infancy. Insufficiency in attachment has proven to be a prominent factor in those cases a child develops antisocial behaviour. Therefore the purpose of the study is to research how antisocial behaviour in children expresses itself and how professionals approach the complex of problems. The result of this study has shown that work to establish safe relations and trust are accentuated to be one of the most significant components in the treatment of these children and therefore it is essential to as soon as possible detect the complex of problems to be able to prevent that such a development of the behaviour occur. To, in time, take action by adequate interventions has shown to be effective when preventing the problem to accumulate. Also as a professional constantly be observant of which methods and interventions that works and presents good effects, and furthermore to promote an evolvement and betterment of said methods. The conclusion of the study shows that prevention doesn’t have to be a concept connected to the age of a person, but rather a concept connected to the age of a problem. A preventive intervention can therefore happen in the early age of an upcoming problem. To be able to treat and handle antisocial behaviour the study has shown that the most fundamental factor is safe and trustworthy relations and individually adapted interventions. The authors have chosen to use a qualitative interview study with an inductive reasoning. Thereafter a qualitative content analysis has been carried out. This method resulted in the empirics being well anchored in reality. Keywords: Antisocial behavior in children, attachment, prevention, individual interventions