PROBLEM TO BE SOLVED: To provide an infusion pump capable of responding to infusion tubes with different outer diameters.SOLUTION: In the infusion pump 100 having a body part and all a door part 110 which can be opened and closed and in which an infusion tube is fixed to a body part when the door part is opened to the body part, the body part has a transmitting section for detecting air bubbles, a receiving section, the first regulating member where either one of the transmitting section or the receiving section is arranged, the second regulating member capable of turning between a pressing position and releasing position, a biasing member for biasing the second regulating member to the releasing position direction, the door part has a pressing member for pressing the second regulating member to the pressing position direction when the door part is opened to the body part.COPYRIGHT: (C)2012,JPO&INPIT【課題】 外径の異なる輸液チューブに対応可能な輸液ポンプを提供する。【解決手段】 本体部と、開閉可能なドア部110とを備え、ドア部100が該本体部に対して閉状態となることで輸液チューブが該本体部に固定される輸液ポンプ100であって、前記本体部は、気泡検出用の送信部と、受信部と、前記送信部または前記受信部のいずれか一方が配された第1の規定部材と、押し付け位置と解放位置との間を回動可能な第2の規定部材と、前記第2の規定部材を前記解放位置方向に付勢する付勢部材と、を備え、前記ドア部は、前記本体部に対して閉状態となった場合に、前記第2の規定部材を、前記押し付け位置方向に押圧する押圧部材を備えることを特徴とする。【選択図】 図2