The device for diffusing volatile substances, comprises a container (1) that contains a volatile substance (2); a perforable sheet (3) that closes at least a portion of said container (1); at least one perforating element (4) that can perforate said perforable sheet (3); and a porous element (5) that is impregnated with the volatile substance (2) when the perforable sheet (3) is perforated; wherein the porous element (5) comprises at least one weakened area (6) in correspondence with said at least one perforating element (4).
It permits to provide a device for diffusing volatile substances where an accidental leakage is avoided.