PROBLEM TO BE SOLVED: To provide a rubber dam clamp causing less discomfort in wearing, and hardly rattling.SOLUTION: There are included: a base part 31 which has elasticity, and in which two wires extend almost in parallel, one ends 31a thereof are connected, and a width between the other ends 31b is expandable； a pair of beaks 33 fixed to each of the two wires so as to let contact surfaces contacting the side surface of a tooth crown T as a treated object face each other； and an engaging part 34 capable of fastening the other end 31b side of the wire to a tooth crown T as a not treated object. A rubber-dam sheet S formed with a hole part H and covered so as to expose the tooth crown T as a treated object from the hole part H is fastened by holding the tooth crown T as a treated object by the pair of beaks 33 while exposing the base part 31 to the front side of the rubber-dam sheet S.【課題】装着時の不快感が少なく、かつがたつき難いラバーダムクランプを提供する。【解決手段】二本の線材が略平行に延びその一端３１ａ同士が連結されてなるとともに他端３１ｂ間の幅を拡開可能で弾性を有する基部３１と、治療対象の歯冠Ｔの側面に当接する当接面が互いに向かい合うように二本の線材のそれぞれに取付けられた一対のビーク３３と、線材の他端３１ｂ側を治療対象外の歯冠Ｔに対して固定可能な係合部３４を備え、孔部Ｈが形成され治療対象の歯冠Ｔが孔部Ｈから露出するように被せられるラバーダムシートＳを、基部３１がラバーダムシートＳの表側に露出したまま治療対象の歯冠Ｔを一対のビーク３３で挟持して固定可能とした。【選択図】図３
