Abstract: Diffuser attachment for hair dryer with a collar and a flared hollow diffuser head. The collar is fixedly attached to the diffuser head. The diffuser head is constructed of semi-rigid molded plastic and includes a plurality of air releasing apertures. The collar, partially comprised of an elastomeric plastic capable of being flexed and deformed by a user. The collar is oval shaped in plan view in its relaxed position. The collar is capable of being deformed by a user into a circular shape to facilitate attachment of the diffuser to a hair dryer nozzle. The collar is capable of tensionally and frictionally remaining in place on the nozzle of the hair dryer when the user releases the collar, conforming to the nozzle, after attachment.