The present invention relates to a quick release buckle of those commonly used for temporarily attaching two belt or band sections, for example of a backpack, sports bag, waist packs, harnesses or leashes for dogs, etc. The object of the invention is to provide said buckle with an additional function such that it can be used for diffusing an insecticide and/or air-freshener substance in the atmosphere, for which a buckle component integrates a diffusion element for diffusing a volatile substance.