Unconditional Respect for Persons (RfP) scale is an instrument for measuring positive attitudes towards autonomy, equality, and integrity of human beings. This research validated and analyzed some psychometric properties of the Spanish version of the RfP scale in a sample of 947 pupils from 12 and 19 years old (M = 15.47, SD = 1.49). Using exploratory and confirmatory factor analysis, we found two factors of respect Disrespect towards people (F1) and Respect toward people (F2). Internal consistency (F1: Omega = 0.82; F2: Omega = 0.78), and convergent and discriminant validity of the RfP were acceptable. Results show that RfP is a valid and reliable instrument for applying to adolescents and young population.