The present invention relates to a medicinal fluid flow rate control apparatus and a medicinal fluid injector including the medicinal fluid flow control apparatus. The medicinal fluid flow rate control apparatus includes: an operation knob being able to be turned； a plurality of medicinal fluid delivery lines each having an elastically deformable tube and arranged such that the tubes are arranged at different heights at a side from the operation knob； a tube support member supporting the tubes； a medicinal fluid converger converging medicinal fluids from the medicinal fluid delivery lines into one stream； and a pipe switch selectively pressing or releasing the tubes to open or block all of the medicinal fluid delivery lines or block some of the medicinal fluid delivery lines, depending on a rotational angle of the operation knob.
