An aluminum alloy foil having superior formability is provided. An aluminum alloy foil, including 0.8 to 2.0 mass% of Fe, 0.05 to 0.2 mass% of Si, and 0.0025 to 0.5 mass% of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil has an average crystal grain size of 20µm or less, and a number of intermetallic compounds existing in the aluminum alloy foil, the intermetallic compounds having a circle equivalent diameter of 1.0 to 5.0µm, is 1.0 x 10 4 grains/mm 2 or more, is provided.