This secondary data analysis investigates how adult attachment styles are associated with multiple measures of relationship quality. Previous research has related attachment to independent relationship aspects but often through single measures that don’t capture adjacent constructs that comprise relationship quality. Couples completed measures of attachment anxiety and avoidance and participated in two separate discussions about personal concerns and relationship problems. Participants also completed various measures of different facets of relationship security. Attachment avoidance was seen to predict greater relationship uncertainty (r = .52) and lower commitment (r = -.42), satisfaction (r = -.47), support effectiveness (r = -.41), and perceived partner responsiveness (r = -.53). Attachment anxiety predicted lower satisfaction (r = -.48), support effectiveness (r = -.54), and perceived partner responsiveness (r = -.57). Actor-partner effects were also analyzed for cross-partnership attachment/quality associations. These findings may help illustrate the relative effect magnitudes that each attachment dimension has on predicting constituent elements of relationship quality.