The aim of this paper is to adapt to Spanish the D. van Direndonck version of Carol Ryff's Psychological Well-Being Scales, and to analyse its consistency and factorial validity. All the scales exhibited good internal reliabilities, with Cronbach alpha's ranging from 0.83 (Self-acceptance) to 0.68 (Personal growth). However, confirmatory factor analyses didn't corroborate the six-factor model (Self-acceptance, Positive relations, Autonomy, Environmental mastery, Purpose in life, and Personal growth) with a second order factor called Psychological Well-Being . To improve the psychometric properties, a new reduced version was proposed that indeed will facilitate the application. The scales of the new version maintain and raise its internal consistency (Cronbach alpha's 0.84 to 0.70). Furthermore, the scales shown an excellent fit to the theoretical model proposed by D. van Dierendonck.