A liquid cooling device that is capable of efficiently cooling a liquid in the inside of a liquid holding container, and a beverage forming device including the liquid cooling device are provided.The liquid cooling device includes the liquid holding container that has an open portion； a container mounting part on which the liquid holding container is to be mounted； an air passage； and an airflow generating unit. The air passage is located directly above the open portion (4b), and at least a part of an outer periphery of the air passage extends along a peripheral edge of the open portion (4b). The airflow generating unit generates, within the air passage, an airflow flowing along the air passage. A hole portion (33) that communicates with the open portion (4b) is provided in a lower surface of the air passage.
