An aggregate board (10; 20), comprising: an insulator having a front face (Aa) and a rear face (Bb); a pair of a first front face wiring pattern and a second front face wiring pattern, a plurality of which are arranged on the front face (Aa) of the insulator; and a pair of a first rear face wiring pattern (21; 51) and a second rear face wiring pattern (22; 52, 53), a plurality of which are arranged on the rear face (Bb) of the insulator; characterized in that the aggregate board (10; 20) further comprises: at least one first inner layer wiring pattern (31; 41) that is separated from the second front face wiring pattern and the second rear face wiring pattern (22; 52, 53), that is connected to the first front face wiring pattern and the first rear face wiring pattern (21; 51), and that extends in a first direction in an interior of the insulator; at least one second inner layer wiring pattern (32; 42) that is separated from the first front face wiring pattern and the first rear face wiring pattern (21; 51), that is connected to the second front face wiring pattern and the second rear face wiring pattern (22; 52, 53), and that has a part that extends in a second direction, which is different from the first direction, in the interior of the insulator; and the first inner layer wiring pattern (31; 41) and the second inner layer wiring pattern (32; 42) being positioned in the same layer, wherein the wiring patterns of the aggregate board (10; 20) are configured such that when a plurality of light emitting elements are connected to the plurality of pairs of the first and second front face wiring patterns (11, 12), the light emitting elements can be individually illuminated. an insulator having a front face (Aa) and a rear face (Bb); a pair of a first front face wiring pattern and a second front face wiring pattern, a plurality of which are arranged on the front face (Aa) of the insulator; and a pair of a first rear face wiring pattern (21; 51) and a second rear face wiring pattern (22; 52, 53), a plurality of which are arranged on the rear face (Bb) of the insulator; at least one first inner layer wiring pattern (31; 41) that is separated from the second front face wiring pattern and the second rear face wiring pattern (22; 52, 53), that is connected to the first front face wiring pattern and the first rear face wiring pattern (21; 51), and that extends in a first direction in an interior of the insulator; at least one second inner layer wiring pattern (32; 42) that is separated from the first front face wiring pattern and the first rear face wiring pattern (21; 51), that is connected to the second front face wiring pattern and the second rear face wiring pattern (22; 52, 53), and that has a part that extends in a second direction, which is different from the first direction, in the interior of the insulator; and the first inner layer wiring pattern (31; 41) and the second inner layer wiring pattern (32; 42) being positioned in the same layer, wherein the wiring patterns of the aggregate board (10; 20) are configured such that when a plurality of light emitting elements are connected to the plurality of pairs of the first and second front face wiring patterns (11, 12), the light emitting elements can be individually illuminated.