Adverse early experiences of adopted children tend to entail emotional deprivation, which may have impaired their attachment relationships. Using an adaptation of a projective test specifically devised to assess attachment in teenagers, the relational histories of 70 Spanish adolescent international adoptees were explored and compared to non-adopted peers. A significant association between insecure attachment and difficulties with internal representation of parental figures (birth and adoptive) appeared in young adoptees with adverse pre-placement care and late adoption. With knowledge of internal attachment’s working models, professionals can improve their understanding of the adopted adolescent and go beyond mere classification of attachment patterns.