The present invention provides a denture patch for preventing the disappearance of the elderly and dementia patients so as to promptly identify the patient's identity in the event of the disappearance or accident of the dementia patient as well as the potential dementia patient, And a pressure sensitive adhesive sheet 20 including an adhesive component so that the bottom surface of the identification sheet 10 is adhered to the adhesive sheet 20. The resin portion 3 of the denture 2 is provided with an adhesive sheet 20, A groove portion 4 corresponding to the size of the adhesive sheet 20 is formed in the groove portion 4 so that the adhesive sheet 20 is inserted into the groove portion 4 and the identification sheet 10 And a transparent coating sheet 30 made of a flexible material having waterproofing property to be laminated on the adhesive sheet 20, the identification sheet 10 and the coating sheet 30 in this order, And is inserted into the groove portion (4) The adhesive sheet 20, the identification sheet 10 and the coating sheet 30 are made of a harmless material, and the pressure-sensitive adhesive sheet 20, the adhesive sheet 20, Is configured so that at least one selected from the group consisting of gelatin, polyacrylic acid, polyvinyl alcohol, xanthan gum, gallan gum, sodium alginate, polyvinylpyrrolidone, polyvinylformamide, carboxymethylcellulose and carboxypolymethylene is selected and used And a rim portion 42 which is laminated on the coating sheet 30 inserted in the groove portion 4 and which is formed so as to protrude outward beyond the periphery of the coating sheet 30 is adhered to the surface of the resin portion 3, Wherein the groove portion is divided into a lower end groove portion and a lower end groove portion which are formed in a two-step step so as to define a lower end groove portion and a lower end groove portion, (20), formula The outer sheet 10 and the coating sheet 30 are stacked in this order so that the outer surface of the coatin
