A diffuser (1) of scents with facilitated activation, comprising: - a main body (2) provided with a supporting wall (3) in which there are, in a recessed arrangement, a tray (4) for collecting a scented substance (S) and an expansion chamber (5), - a separation film (6) which is superimposed on the main body (2) so as to close the collection tray (4) and the expansion chamber (5) and is provided with at least one through slot (7) at the chamber, and - a breathable membrane (10) superimposed on the separation film (6) at least at the at least one slot (7). The separation film (6) is associated with and adherent to the supporting wall (3) at least at a first perimetric band (8) which is external to the collection tray (4), at a second perimetric band (18) which is external to the expansion chamber (5) and at at least one region (9) for connection between the tray and the chamber. The diffuser comprises retractor means (11) which are accommodated at one or both of the collection tray (4) and the expansion chamber (5) in order to detach the separation film (6) and the supporting wall (3) at the at least one connection region (9) so as to define at least one channel (12) for the passage of the scented substance (S). The retractor means (11) can be activated by way of a pressure applied from the outside at one or both of the collection tray (4) and the expansion chamber (5).
