The perception of being ostracized in a foreign country is a great obstacle that may lead to international students' strain. The present study aimed to understand ostracism from the perspective of adult attachment. We proposed a moderated mediation model in which attachment anxiety was hypothesized as an antecedent of ostracism and as a moderator of the ostracism -- strain links. Participants were 119 international students enrolled at a large public university in U.S. Results largely supported the model, which showed that the attachment anxiety exaggerate the harmful effects of perceived ostracism on depression and physical symptoms. Theoretical and practical implications were discussed.