Abstract: A whitening powder comprises the following ingredients:______________________________________ (A) trimethylsiloxylated silicic acid anhydride 0.1 to 7 wt. % having a specific area of at least 80 m.sup.2 /g and a hydrophobicization degree of at least 50% (B) polyhydric alcohol 5 to 40 wt. % (C) water 50 to 94 wt. % (D) whitening ingredient 0.01 to 5 wt. %. ______________________________________The whitening powder is substantially free of any powder coated with a fluorine compound, the weight ratio of the ingredient (B) to the ingredient (A) is at least 1, and the sum of the ingredient (B) and the ingredient (C) accounts for at least 80 wt. % of the whitening powder.