This paper presents the results of a study that describes the sleep routines in a sample of 2400 Andalusian adolescents aged between 12 and 17 years and its relation to three indicators of psychological adjustment such as substance use, and internalizing and externalizing problems, both assessed by the Youth Self Report (YSR; Achenbach, 1991). The results indicate that, particularly among older teens, there is a significant sleep deprivation during school days, and a delay in bedtime hours during weekends. These sleep routines were significantly related to psychological adjustment, since those boys and girls who reported sleeping fewer hours and going to bed later on weekends had a worse emotional and behavioral adjustment. The article suggests the importance of developing some measures to allow teens healthier sleep routines.