The present invention relates to an adhesive sheet for teeth which has high safety and makes it possible to obtain excellent tooth whitening effect and tooth gloss effect by a simple means of just being attached to teeth. The adhesive sheet for teeth comprises: a layer (A) that has a pH of 6.6 or more and 10.5 or less when the layer (A) is dissolved in water, and a layer (B) that comprises a component (b) of one or more kinds selected from phytic acid, hexamethaphosphoric acid, an organic acid having a pKa of 4.5 to 7.0 at 25° C. and salts thereof, and that has a pH of 3.5 or more and 6.5 or less when the layer (B) is dissolved in water.
