The need to study the positive aspects of body image led to the design of the Body Appreciation Scale (BAS). The aim of the present study was to develop a Spanish adaptation of the BAS for adolescents, testing its factor structure, construct validity and any differences between girls and boys. Participants were 312 adolescents aged between 12 and 20; there were 148 females and 164 males. The validation analysis of the BAS revealed a one-factor structure with adequate internal consistency (Cronbach's alpha = .908) and construct validity (correlations with body mass index, influence of the body shape model, perceived stress, coping strategies, self-esteem and variables from the Eating Disorders Inventory-2), as well as significant differences between boys and girls (p < .01). The BAS is suitable for administration in a Spanish adolescent population as a way of analysing the positive aspects of body image.