An illuminating device of the invention is an illuminating device which can eliminate an illumination in an unnecessary direction, and selectively illuminate a necessary desired area.An illuminating device 100 in which an illumination direction is freely changeable, includes: a light source portion 15 including: a light emitter having a plurality of light emitting diodes installed on a base; a first reflector formed of parabolic surfaces which are provided on a light emergence side of the light emitter in such a way as to correspond to the plurality of light emitting diodes, and light emitting faces of which fall in focal positions; and a second reflector having a pair of flat plate-like reflecting surfaces which, being arranged with the light emitting diodes sandwiched therebetween, farther to the light emergence side than the first reflector and parallel to an array direction of the light emitting diodes, reflect light from the light emitting diodes toward the light emergence side; an arm 17 which supports the light source portion on one end thereof; and a light source support 13 which rotatably supports the other end of the arm 17.