According to Weiner’s model, help giving has various determinants such as social and individual causes, affective reactions, and responsibility. The aim of this study was (1) to examine the influence of bullying acts, the victim’s behavior at work, and revictimization on equity judgments and the perceived responsibility of perpetrators and victims; and (2) to test the determinants of help decisions. Twelve vignettes of bullying at work submitted to 133 participants varied according to the severity of bullying, the victim’s pro- or antisocial behaviors, and the victim’s antecedents. The results showed that the situation was judged less equitable, the victim less responsible, and the perpetrator more responsible, and the intention of help was increased, (1) when the perpetrator’s acts were serious, and (2) when the bullied person had shown prosocial behavior versus antisocial behavior. The help increased more (1) when the perpetrator’s acts were harmful and (2) when the victim had shown prosocial behaviors.