A pump body 11 to advance and retreat drive the plurality of fingers 21 ... 21, in the infusion pump that includes a door 12 to cover the infusion tube mounting portion of the pump body 11 to freely open and close, finger group 21 of the pump body 11 each laterally opposite sides of 21 provided with a fitting convex portion 5, the door 12 side provided with a fitting recess 6 which fits in the fitting portion 5. By keeping this manner provided a fitting projection 5 and the fitting concave portion 6, when the infusion tube T is deviated to the side of the finger 21 without being properly set, the fitting convex portion 5 of the pump body 11 side and because the infusion tube T between the fitting concave portion 6 of the door 12 side becomes impossible to close the door 12 caught, it can be that set failure user nurses know.複数のフィンガ21・・21を進退駆動するポンプ本体11と、このポンプ本体11の輸液チューブ装着部を開閉自在に覆う扉12とを備えた輸液ポンプにおいて、ポンプ本体11のフィンガ群21・・21の側方両側にそれぞれ嵌合凸部5を設けるとともに、扉12側には前記嵌合凸部5に嵌り合う嵌合凹部6を設ける。このように嵌合凸部5と嵌合凹部6とを設けておくことにより、輸液チューブTが正しくセットされずにフィンガ21の側方に外れた場合、ポンプ本体11側の嵌合凸部5と扉12側の嵌合凹部6との間に輸液チューブTが挟まって扉12を閉じることができなくなるので、そのセット不良を看護師等のユーザが知ることができる。
