The invention relates to N-alkyl-N-acylglucamines of formula (I), which exhibit in hair-washing agents comprising an aqueous Surfactant System with at least one anionic Surfactant, a hair-conditioning effect, wherein, in formula (I), Ra is a linear or branched, saturated or unsaturated C5-C2 1 alkyl radical and Rb represents a C 1-C4 alkyl radical, and wherein the N-alkyl-Nacylglucamines (I) contain at least 8 wt.%, based on the total amount of N-alkyl-N-acylglucamines (I), of Compounds with a saturated C i6 -, C i8 - or a mono- or polyunsaturated C i fatty acid radical Ra-CO-.