In this study, which is the result of a qualitative research with a phenomenological approach the author analyses the real meaning of night-work and the resting regarding eleven nurses from five different Health Center. She concludes that the importance of night-work is of a such responsability once it is considered a lot tiring, absorving and stressing activity. The author also mentions that the rest is very much necessary, once that for most of the professionals it happens only after duty in the night off, and that the self-care of everyone is already endangered by the fact of them, working at night and are t exacerbated by the necessity of having another job during the day. Finally the author suggests that both nurses and Employers should focus on this problematic question.