PROBLEM TO BE SOLVED: To provide a dental therapy implement which prevents leakage of photopolymerizable CR (Composite Resin) to be filled from an occlusal surface, facilitates therapy of a cavity part, achieves cavity restoration with sure contact of a protuberance part of a therapy requiring tooth and a contact point of an adjacent tooth, and achieves little dispersion in perfection of cavity repair.SOLUTION: The dental therapy implement is used for restorative treatment of a cavity by being applied to an outer periphery of a tooth to be treated, and includes a tape-like support material made of a resin film and applied to the outer periphery of the cavity, and a small piece attached to the support material and housable in the cavity. The support material has an opening, and the small piece is molded in accordance with the shape and size of the cavity beforehand, has a protuberance part (contact part to be in contact with the adjacent tooth after the cavity repair), and the protuberance part is attached to the support material in such a manner that the protuberance part is projected from the opening to the opposite side of a small piece attaching surface and can be in contact with the contact point of the adjacent tooth adjacent to the therapy requiring tooth and be housed in the cavity.
