This study was the first to examine relations between attachment and religion-spirituality in adults using a developmentally validated attachment assessment, the Adult Attachment Interview. Security of attachment was expected to be linked to a religiosity-spirituality that is socially based on the parental relationships and reflects extrapolation of attachment experiences with sensitive parents to perceived relationships with a loving God. Insecurity of attachment was expected to be related to religiosity-spirituality via emotional compensation for states of insecurity. Participants (N = 84; 40% men; mean age = 29 years) were drawn from religious-spiritual groups. Religiousness-spirituality was assessed with questionnaires. Results generally supported the hypotheses ( ps = 0.05). Estimates of parental loving were linked to socially based religiosity, loving God images, and gradual religious changes occurring at early ages and in life contexts indicating a positive influence of close relationships. Estimates of parental rejection and role reversal were related to New Age spirituality and sudden-intense religious changes occurring in life contexts of turmoil. Current attachment state of mind was generally unrelated to traditional religiosity, but current preoccupation, unresolved- disorganized, and cannot classify states were associated with New Age spirituality.