PROBLEM TO BE SOLVED: To provide a drawing type pump capable of automatically determining whether or not a clearance size between the inner peripheral wall surface of a fixing cavity and a drawing part is appropriate.SOLUTION: This drawing type pump comprises a fixing cavity part 8a capable of fixing a tube 1a to be drawn that is connected to an arterial blood circuit 1, and a roller 10 enabling inner liquid to be moved in the arterial blood circuit 1 by drawing the tube 1a to be drawn fixed to the fixing cavity part 8a in a longitudinal direction while compressing it in a radial direction, there are provided a load sensor 18 capable of detecting a displacement in a radial direction of the drawn tube 1a fixed to the fixing cavity 8a, and clearance determination means 21 capable of determining a propriety about the clearance size between the inner peripheral wall surface of the fixing cavity part 8a and the roller 10 on the basis of the displacement detected by the load sensor 18.
