The present invention relates to a volatile substance diffuser, where said diffuser comprises a reservoir (10) containing the volatile substances, characterized in that it is formed from a sheet (11) provided with a plurality of fold lines, said sheet (11) comprising a first face (1) on which said reservoir (10) is fixed； a second face (2) which supports the diffuser upright in a use position together with said first face (1)； and a third face (3) provided with a hole (12) for hanging the diffuser. The present invention allows providing a volatile substance diffuser which prevents using a container housing said diffuser.
