[Object] To provide a peristaltic pump in which blockage of a liquid flow route can be detected without connecting a new separate member to the liquid flow route. [Solution] A peristaltic pump includes a mounting concave section 8a on which a peristaltically-actuated tube 1a connected to an arterial blood circuit 1 is mountable； a roller 10 which compresses the peristaltically-actuated tube 1a mounted on the mounting concave section 8a in a radial direction and causes the peristaltically-actuated tube 1a to be peristaltically actuated in a longitudinal direction such that a liquid therein is flowable in the arterial blood circuit 1； a load sensor 18 that is able to detect displacement of the peristaltically-actuated tube 1a mounted on the mounting concave section 8a in the radial direction； and blockage detecting means 19 that is able to detect a blockage of the arterial blood circuit 1 based on the displacement detected by the load sensor 18.
