Aluminum alloy sheet with excellent baking paint hardenability

This aluminum alloy sheet comprises a specific 6000-series aluminum alloy sheet wherein the sum (total amount) of Mg and Si present in specific clusters of atoms has been regulated and the sum of Mg and Si present in the clusters of atoms has been ensured so as to be balanced with the total amount of Mg and Si in solution in the matrix. Thus, bake hardenability after room-temperature aging and proof strength after bake hardening are further improved.