An aqueous-solution supply device that, with a simple structure, is capable of agitating, inside said device, an aqueous solution contained inside an aqueous-solution bottle. Said aqueous-solution supply device, which supplies an aqueous solution from an aqueous-solution bottle (23) containing same to a medication-administration bottle, is provided with: a holder (78) that holds the base (23B) of the aqueous-solution bottle (23)； and a rotary drive unit (61) that generates torque and rotates the holder (78) and the aqueous-solution bottle (23) held thereby about an axis (L3) that runs along the centerline (L2) of the aqueous-solution bottle (23).
