The present invention relates to a flowrate regulating device for a medical infusion set and, more specifically, to a flowrate regulating device for an infusion set, the device comprising: a body member formed in a cylindrical shape opened vertically, and having an inflow tube and a discharge tube, which protrude from both sides thereof a rotating member rotatably coupled to the upper end of the body member, and having a plurality of flowrate regulating passages provided on the outer diametral surface thereof and connected to the inflow tube a fixing member fixedly coupled to the lower end of the body member, and having a discharge passage provided on the upper surface thereof and connecting the lower ends of the flowrate regulating passages and the discharge tube and an injection port unit selectively provided at the rotating member and/or the fixing member.
