A liquid medicine dispensing device includes a rotary unit 12 which rotates while holding a plurality of original drug vials 100, and a conveyance mechanism that conveys a prescription bottle 110 in the horizontal direction on the underside of the rotary unit 12. Each of the original drug vials 100 is connected with a discharge nozzle 17 to which a discharge valve 26 is attached, and an air nozzle 29 connected with a pump and an atmospheric relief valve. When discharging liquid medicine, the prescription bottle 110 is conveyed in advance to a position that is directly below an original drug vial 100 required for dispensing. In that state, the original drug vial 100 is inverted by rotating the rotary unit 12 by 180 degrees, and the discharge valve 26 is opened.