The present invention is directed to a U-shaped patch for oral health care, comprising a thin film layer and a support layer, and the inner and outer margin of the U-shaped patch have at least one notch or cut line so that the patch can be folded as a three-dimensional concave shape, wherein the thin film layer comprises a health care agent. The present invention uses a two-layered design comprising a thin film layer and a support layer, and a health care agent in the adhesive layer effective for caries prevention, whitening and/or remineralization. The patch of the present invention can closely cover teeth with the thin film layer to enable the health care agent to tightly contact the teeth so as to increase the efficacy on tooth care.
