A tooth whitening composition includes a whitening component； a metal ion chelator； water； and polyalcohol, the weight ratio of the water and the polyalcohol being, water : polyalcohol = 3.5 : 1 to 20 : 1, and also, the total amount of the water and the polyalcohol, in the composition, being greater than or equal to 50 wt.% and less than or equal to 85 wt.%.
