To promote mobility of a viscous fluid pump mounted on a chassis frame and used as a viscous fluid pump car.

A bracket 17 is projected on a chassis frame 6. A plurality of pin holes 18 are made in the bracket 17 in the vertical direction. A movable frame 16 is borne on the bracket 17 with pins 19 and can be slantly moved. A hydraulic cylinder 20 for slantly moving the movable frame 16 is provided. A viscous fluid pump 1 is mounted on the movable frame 16 to bear, and the movable frame is so slantly moved that a mounting angle of the viscous fluid pump 1 can be changed. A bracket 24 is provided to a hopper 5, a fixing bracket 22 having a plurality of pin holes 23 is fixed a backward position of a deck frame 8, a pin hole of the bracket 24 on the hopper 5 side coincides with an optional pin hole among the pin holes 23 of the fixing bracket 22 to fix them with a pin 25, and the viscous fluid pump 1 is fixed at an optional mounting position.