The object is to provide a wrinkle improving agent having an excellent wrinkle improving effect. A compound expressed by the following Formula (1), or an acid addition salt thereof is used as an active ingredient of a wrinkle improving agent.(Wherein X represents an alkylene group having 1 to 2 carbon atoms in which a hydrogen atom may be substituted with a methyl group, Y represents COOR1 or CH2OR2, R1 represents a hydrogen atom, or an optionally branched alkyl group having 1 to 6 carbon atoms, and R2 represents a hydrogen atom, or an optionally branched acyl group having 1 to 6 carbon atoms.)
