In the current study, we examine the novel hypothesis that perceived stress is a mechanism through which the relationship between attachment orientations and university adjustment can be explained. Present study explored both attachment orientations and perceived stress regarding adjustment; and perceived stress as mediator for the relationship between attachment orientations and adjustment among in 277 university freshmen. Attachment anxiety and avoidance positively correlated with perceived stress whereas resulted in poor university adjustment. Perceived stress partially mediated the relationship between attachment anxiety and poor university adjustment. The findings suggest that enhancing attachment security and stress management skills among insecurely attached students may lead to greater university adjustment.