Two resin films each provided with an orally administrable edible agent layer are joined so that administrable agent layers face each other, drawn into a nip between a pair of press rolls, pressurized at back surfaces to bond the administrable agent layers together, and conveyed in a direction substantially conforming to a tangential direction at a pressurization zone of the press rolls. A delamination roll disposed in the conveying direction is used to draw only one of the two resin films sandwiching the bonded plural administrable agent layers in a direction different from the conveying direction, while continuously conveying the other resin film retaining the plural administrable agent layers in the conveying direction. This allows only one of the joined two resin films to be delaminated. The obtained pressure bonded product, that is, an orally administrable edible agent of laminate film form can be punched out into predetermined shapes.
