The paper deals with one of the most fundamental elements of phenomenological theory of knowledge – the constitution of inner time consciousness. It provides a basic introduction into certain parts of Husserl’s research, as we can find it in his lectures Phenomenology of internal time-consciousness edited by M. Heidegger and E. Stein and published in 1928. Using concrete examples of some perceiving acts the author demonstrates an intentional analysis of perceiving acts in general. The author comes to the conclusion, that (...) the descent of time is grounded on a conscious activity – intentional focusing – of cognitive subject. Time „does not hang“ on „objectively“ temporal objects. (shrink)