The present invention provides a transparent solid detergent containing (A) N-acyl acidic amino acid salt, (B) acylglycine salt and (C) polyvalent alcohol, at a proportion of (A) 4.5-5000 parts by weight and (C) 2.5-2400 parts by weight, per 1 part by weight of (B), which suppresses coloration by heating during production, is superior in preservation stability at low temperature and high temperature, is low irritant, and shows good sense of use.