The chances that a teacher will intervene in a case of bullying appear to be associated with several variables, which may be resumed as the confidence that he has in his capability to deal with problems at school. In accordance with Social Cognitive Theory and Attribution Theory, the three-factor model of self-confidence was used to investigate the differences between preservice teachers (PSTs) and in service teachers (ISTs). A qualitative approach was used to examine the strategies of intervention suggested against bullying at school by teachers. Results showed that there are different profiles to PSTs and ISTs. In both groups, participants with low outcome expectations (OEs) revealed a propension to intervention in the classroom, while those characterized by high external locus of control tend to intervene only upon the victims and the bullies. ISTs with high OEs are the group most likely to intervene directly, because they are self-confident in their abilities to put an end to the problem. Overall, the data show that professional experience is important for the interpretation of the phenomenon and remedies suggested. This does not mean that interventions suggested by IST are necessarily effective, but that they tend to have a stronger sense of self-efficacy. Keywords: bullying, qualitative approach, victims, teacher, italy inTrODUcTiOn School bullying is a serious and pervasive problem that has been scrutinized by psychologists, social scientists, and educators since at least the 1970s. It is defined as a repeated, intentionally aggressive behavior that involves an actual or perceived imbalance of power between the perpetrator(s) and the victim(s) (Olweus, 1993(Olweus, , 2003Patton et al., 2017). Bullying generally occurs at school (in the classrooms, the hallways, the bathrooms, the courtyards, and so on) (Hong and Espelage, 2012) and may take different forms. In a dichotomous classification, it may be overt (consisting of material actions such as hitting, punching, or kicking, or verbal aggressions such as insults and threats) or covert (consisting of less visible acts, like gossiping, social exclusion, laughing at, and isolating) (Byers et al., 2011;Power-Elliott and Harris, 2012;Platt et al., 2016). Research has mostly studied bullying at the peer group level, emphasizing its role in influencing the current and future behaviors of the perpetrators, victims, and witnesses (Salmivalli et al., 1996;Salmivalli, 2010;Boulton et al., 2017). However, while reactions from peers certainly affect how students may become involved in and cope with these events (Saarento et al., 2015), other facts are just as important.Recent research has stressed the role of teachers in recognizing episodes of bullying and identifying their actors, as well as in preventing and intervening on them (DeOrnellas and Spurgin, 2017 reinforces or inhibits the various possible behaviors on the part of the bullies, the victims, and the bystanders (Craig et al., 2011), and in general affects how pupils perceive and react to bullying (Gini, ...