The present research tested the effects of being ostracized on risk-taking behavior and how emotional responses to ostracism mediate these effects. In two experiments, undergraduates were either ostracized or included during an Internet ball-toss game (Cyberball). In Experiment 1 (N = 52), ostracism increased self-reported risk-taking inclinations, and the relation between ostracism and risk-taking was mediated by feelings of anger, but not control. In Experiment 2 (N = 72), ostracism increased risky driving during a driving video game. The effect of ostracism on risk-taking was again mediated by post-ostracism anger (but not control or ostracism-induced sadness). This research suggests that anger elicited by ostracism may increase risk-taking.