The study explored whether the reasons for anger varied according to the type of relationship with the causal agent. Young adults from Mexico City (N=282) described an anger event, its causes, and the person they got angry at. Frequency analysis showed that there are five appreciations that generate anger (injustice, offense/aggression, disrespect, frustration, and disagreements) in five types of interpersonal relationships (relatives, strangers, couple, classmates, and friends). Specifically, it was found that the appreciations of injustice and offense/aggression generated anger with all causal agents. Therefore, interventions aimed at emotional regulation should take into account the fact that the appreciation of emotional stimuli differs depending on the type of interpersonal relation.