Provided is a clarifying agent composition which is capable of yielding a molded article having excellent transparency whose initial coloration is suppressed. The clarifying agent composition is characterized by comprising 1.0 to 10 parts by mass of a colorant with respect to 100 parts by mass of a clarifying agent represented by the following Formula (1): (wherein, R1 to R4 each independently represent a hydrogen atom or an alkyl group having 1 to 9 carbon atoms; R5 represents a hydrogen atom or a methyl group; n represents 1 or 2; and M represents an alkali metal when n is 1, or Al(OH) when n is 2).