The present invention relates to damaged hair , imparts hydrophobicity and smoothness, to provide cosmetics containing the cosmetic base material and the cosmetic base material to improve the combability of . The following general formula in the active amino group of A peptide (I) [In the formula, R 1, -CH 2 CH 2 -, - CH = CH-, or, -C 6 H 4 - are shown] Some of the acid functional groups of the acyl peptide substituent is bonded, represented by or all, the following general formula (II) (Wherein, R 2 represents a cyclic hydrocarbon, saturated or unsaturated, saturated or unsaturated chain hydrocarbon or 11-25 carbon atoms carbon atoms 11~25, R 3 is 1 to 3 carbon atoms of an alkylene group, constitutes a cosmetic base in R 4, R 5 is an acyl peptide of the fatty acid amidoamine salt formed by neutralizing a fatty acid amidoamine represented by each represents an alkyl group having 1 to 3 carbon atoms), the Cosmetics It is allowed to contain a base material to configure the cosmetics.【課題】損傷した毛髮に対して、疎水性及び滑らかさを付与し、該毛髮のくし通り性を良好にする化粧品基材及び該化粧品基材を含有する化粧品を提供する。【解決手段】ペプチドの活性アミノ基に下記の一般式(I)〔式中、R1は、-CH2CH2-、-CH=CH-、又は、-C6H4-を示す〕で表される置換基が結合したアシルペプチドの酸性官能基の一部又は全部を、下記の一般式(II)(式中、R2は、炭素数11~25の飽和若しくは不飽和の鎖式炭化水素又は炭素数11~25の飽和若しくは不飽和の環式炭化水素を表し、R3は炭素数1~3のアルキレン基を表し、R4、R5はそれぞれ炭素数1~3のアルキル基を表す)で表される脂肪酸アミドアミンで中和したアシルペプチドの脂肪酸アミドアミン塩で化粧品基材を構成し、該化粧品基材を含有させて化粧品を構成する。
