The present invention is directed to provide an infusion pump capable of safely feeding medicinal solution, whereby a medicine is prevented from freely flowing through an infusion tube when the access cover is still opened even though the infusion tube is attached to the infusion pump, and the medicinal solution is passed through the infusion tube when the access cover is closed. An infusion pump 1 includes a tube attachment section 50, an access cover 5 of the tube attachment section 50, a tube clamp mechanism 500 for clamping and blocking a middle portion of an infusion tube 200. The tube clamp mechanism 500 forms a blocking portion 200S at the infusion tube 200 by means of a clip member 510 by closing a clip member 510 preliminarily attached to the middle portion of the infusion tube 200 in the case where the access cover 5 is opened, and eliminates the blocking portion 200S by opening the clip member 510 in the case where the access cover 5 is closed.
