Aluminum alloy plate exhibiting excellent baking finish hardening properties

The BH properties of a specific 6000-series aluminum alloy plate after aging at room temperature is further improved by including a predetermined density or greater of a specific cluster having a large effect on BH properties, and by controlling the proportion of clusters having a large Mg atom number, as measured by means of a 3D atom probe field ion microscope, to be greater than other clusters of atoms satisfying prescribed conditions. Provided is a 6000-series aluminum alloy plate exhibiting excellent BH properties and molding properties after aging at room temperature.