AbstractIn four studies, we tested if workplace secure attachment entails organisational benefits, given that such relationships are associated with increased positive relationship emotions. In Study 1, employees rated the extent to which colleagues, supervisors, and other individuals fulfil the attachment functions. In Study 2, employees listed up to 10 individuals before completing the same rating task as Study 1. In the remaining studies, employees rated their attachment security with their supervisors (Study 3) or colleagues (Study 4), and completed measures of positive relationship emotions with these individuals, proactive behaviour, organisational allure, and organisational deviance. We found that supervisors and colleagues fulfil attachment functions (Studies 1–2), and that workplace attachment security confers organisational allure and proactive behaviour due to its association with positive relationships emotions. However, workplace attachment security directly lowers organisational deviance (Studies 3–4). Thus, supportive and trusting work environments may encourage workplace relationships that could bestow organisational benefits.