The object is to provide a wrinkle improving agent having an excellent wrinkle improving effect. A compound expressed by the following Formulas (1) and/or (2) is used as an active ingredient of a wrinkle improving agent.(In Formulas (1) and (2), R and R' independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R" represents an alkylene group having 1 to 3 carbon atoms, and n represents a number of 0 or 1.)
