An object of the invention is to provide a conditioning agent and a conditioning composition which are excellent in adsorptivity to fibers, hair, skin, etc. and impart smoothness thereto. A conditioning agent comprising an amide alcohol represented by formula (I).本發明的目的在於提供一種調節劑及調節組合物,其對纖維、毛髮、皮膚等之吸附性優異,且賦予光滑性。本發明的調節劑包含式(I)所示的醯胺醇。