This illuminating apparatus is provided with: columnar light guide bodies (1, 2); substrates (11, 12), each of which has a pair of light sources (3, 4, 5, 6) fixed to one surface thereof; through holes (7a, 7b, 8a, 8b), which have inserted therein end portions of the light guide bodies (1, 2), said end portions being in the columnar center axis direction of the light guide bodies, and which hold the light guide bodies (1, 2); and holders (7, 8), which have formed thereon engaging sections (7c, 7d, 8c, 8d) that hold the substrates (11, 12) by engaging with the substrates (11, 12) in a state wherein the light sources (3, 4, 5, 6) face, at the positions of the through holes (7a, 7b, 8a, 8b), the end surfaces of the light guide bodies (1, 2), said end surfaces being in the columnar center axis direction of the light guide bodies.