To enable making the width of an LED wiring board compact and reducing the number of assembly parts and assembly man-hours as well.

Each of LED wiring boards 3 includes a plurality of LEDs 31 arranged in a row along a length direction and power feeding line members 32a, 32b arranged in parallel with the plurality of the LEDs 31. The power feeding line members 32a, 32b are arranged on an upper part from an LED mounting face 3b of the LED wiring board 3, and in the neighboring LED wiring boards 3, the power feeding line members 32a, 32b arranged on the one LED wiring board 3 have contact terminals 321a, 321b which are arranged extending outside in a length direction and contact with the power feeding line members 32a, 32b of the other LED wiring board 3.