Abstract: The present invention provides a skin cosmetic having an excellent whitening effect to inhibit skin tanning by ultraviolet rays and having high safety. The skin cosmetic product includes a melanogenesis inhibitor comprising as an active ingredient an acylated biphenol compound represented by the following general formula (1): wherein R1 and R2 are each a hydrogen atom or an acyl group having 2 to 10 carbon atoms, provided that both R1 and R2 are not hydrogen atoms; and R3 and R4 are each a hydrogen atom or a linear or branched saturated hydrocarbon group having 1 to 8 carbon atoms.