Amae is a Japanese term that refers to an individual's inappropriate behaviour when he/she presumes indulgence from a significant other. The link between attachment style and amae has been debated, but few studies have examined this link empirically. This study examined the association of attachment style with amae behaviour in Japanese dating couples over a two-week period. Results showed that for Japanese men, anxious attachment was positively associated with their amae behaviour, and in turn, with their increased relationship quality. Conversely, avoidant attachment was negatively associated with their amae behaviour, and in turn, with their decreased relationship quality.