In an electronic device, pairs of fixing jigs are provided on an extraction side of pairs of guide rails and extend in an extraction direction respectively along both ends of a circuit board. The fixing jigs of each pair are disposed on the sides of both surfaces of the circuit board such that their distal ends are spaced at a second interval longer than a first interval. Pairs of jig guiding portions are provided on a faceplate and extend in an insertion direction respectively along both ends of the circuit board. The jig guiding portions of each pair are disposed on the sides of both surfaces of the circuit board such that their distal ends are spaced at a third interval longer than the sum of the second interval and the thicknesses of the distal ends of the pair of fixing jigs.