A drum brake device (11) is provided with first and second brake shoes (27, 29), a wheel cylinder (13), an anchor section (15), an adjuster (17), an expansion mechanism (19) which expands the first brake shoe (27) and the second brake shoe (29), a switching lever mechanism (21) which is rotated by the operating force of the expansion mechanism (19) which is greater than or equal to a predetermined level, and a switching strut (23) which follows the rotation of the switching lever mechanism (21) and expands adjacent ends of the first and second brake shoes (27, 29), the adjacent ends facing the anchor section (15).