A cooling device according to one embodiment of the present invention comprises: a case; a tray installed inside the case and on which a beverage container is placed; a mixing member configured to perform a seesaw motion about a mixing axis to mix a fluid filled in the beverage container; a driving part connected to the mixing member and configured to provide driving force; and a cool air supply part configured to supply cool air into the case, wherein the mixing member comprises: a supporter configured to protrude from a bottom of the case, the tray being connected to an upper end of the supporter to perform the seesaw motion; a driving link connected to one end of the case; and a mixing motor configured to transmit the driving force to the driving link, wherein the tray comprises: a tray body; a first seating part formed on the tray body so that the beverage container is placed in a lengthwise direction of the tray body; and a second seating part formed on the tray body in a direction that crosses the first seating part.