Abstract: The aim of this study is to the ties between time and daydreaming. The purpose is to show the peculiar meaning of time that daydreaming produces. Such an approach could be seen as quite weird since daydreaming is the opposite of a methodological approach. But difficulties don’t stop with this point. We will see that daydreaming prepares a double understanding of time: on one hand a psychological one, a cosmological on the other.