A method for producing an oral cavity patch comprising a drug layer and an adhesive layer involves: filling a first layer powder that constitutes the drug layer into a mortar of a tableting machine; compressing the first layer power with a tableting pressure of 0.2-1.2 kN to form the drug layer; filling a second layer powder that constitutes the adhesive layer onto the drug layer inside the mortar; compressing the drug layer and the second layer powder with a tableting pressure of 6.0-26 kN to form the adhesive layer; and compressing the drug layer and the adhesive layer with a tableting pressure of 7.5-26 kN.