It should take into account the pediatric context and the child's development moment to evaluate the quality of life in childhood from a standardized instrument. We present the questionnaire AUQEI validation by its application in 353 children, between 4 and 12 years-old, obtaining a cut off point of 48, internal consistency with a Crombach's alpha of 0.71 and construct validity (r = 0.497). With these psychometrical qualities, the scale shows its importance as a diagnostic tool.