The present invention relates to a diffuser of perfume and / or sanitising, including: - a first (1a) and a second (1b) storage zone of the granules (2) impregnated with a perfume and / or sanitising, - a flow duct (3) connecting the two storage zones (1a, 1b), which duct opens out in each of said zones, so that the granules (2) pass from a storage zone to another by rotation of the diffuser (1), - of the openings (3100) making it possible to diffuse the perfume and / or sanitising during the turning over of the diffuser (1), characterized in that the flow duct (3) comprises at least a flow channel (3a) having a slope helical, so that the granules (2) slide and / or rolling on the said spiral slope to pass from a storage zone to the other.
