The flow battery in an aspect of the present disclosure includes a first liquid containing a lithium ion and a first redox material, a first electrode in contact with the first liquid, a second electrode functioning as a counter electrode of the first electrode, an isolation unit that isolates the first electrode and the second electrode from each other, a first chamber, and a first circulation mechanism for circulating the first liquid between the first electrode and the first chamber, and in the flow battery, the first liquid is non-aqueous and the first circulation mechanism includes a magnetically driven pump.