The aim of this study was to evaluate sleep beliefs in students of helping professions and to explore differences in sleep beliefs considering circadian typology. We have also investigated relationship between sleep beliefs, self-assessment of awareness of rules about healthy sleep and self-assessment of sleep quality. Moreover we have investigated relationship of circadian typology with assessment of awareness of healthy sleep rules and assessment of one's own sleep quality. This research was conducted online among 563 students from seven different helping professions study programmes of University of Zagreb. Sleep beliefs were tested with Sleep Beliefs Scale (Adan et al., 2006), circadian typology with Composite Scale of Morningness (Smith et al., 1989), assessment of awareness of healthy sleep rules and assessment of one's own sleep quality with self-evaluation. According to the results, helping professions students don't have entirely correct sleep beliefs. Average percentage of correct sleep beliefs was 61%. The lowest number of students had correct beliefs of positive effect of getting up when it is difficult to fall asleep, negative effect of recovering lost sleep by sleeping for a long time and negative effect of trying to fall asleep without having a sleep sensation. The results have showed low positive correlation between correctness of sleep beliefs and one's own assessment of awareness of healthy sleep rules and that greater assessment of one's own sleep quality is significantly correlated with greater tendency toward morningness. The differences in the correctness of sleep beliefs between students of different circadian typology wasn't found, nor was the correlation between correctness of sleep beliefs and assessment of one's own sleep quality, neither the correlation between circadian typology dimension and assessment of awareness of healthy sleep rules.