Two studies examined the relation between adult attachment styles and post-transgression responses. Secure participants were predicted to be forgiving, preoccupied participants to be grudge oriented, fearful participants to be avoidant, and dismissing participants to be vengeful. Study 1 was nonexperimental, using a community sample of adults (N = 565). Participants wrote about a moderately severe past transgression. Results supported the predictions. In Study 2, undergraduates' (N = 134) attachment styles were manipulated by varying working models of self and other. Model of self was manipulated with false performance feedback. Model of other was manipulated by altering a confederate's availability and responsiveness during a bonding exercise. Response trends replicated Study 1 with the exception of avoidance. Dismissing individuals were the most avoidant.