Usability of device is improved for an imaging device that images a target object mounted on a table. In order to hold a camera head 120 and an illumination unit 130 with respect to a table 110 on which a target object is mounted, an imaging device 100 coaxially and rotatably supports a camera head holding arm 140 and an illumination unit holding arm 150 at an elevated portion 118, which is located at an inner-left corner of the table 110, such that degrees of inclinations of the arms may be variable with respect to the table 110. The arms are rotatably and axially supported at the elevated portion 118 such that the camera holding arm 140 can rotate with an accompanying rotation of the illumination unit holding arm 150 and the illumination unit holding arm 150 can rotate independently with no accompanying rotation of the camera holding arm 140.