An imaging device of the present invention includes: a first case having an opening; a substrate on which a first terminal electrically connected to an imaging element is mounted, the substrate being provided in the first case; a second case covering the opening of the first case; and a connector. A first terminal accommodation portion accommodating the first terminal is fixed to the substrate. The connector includes a second terminal accommodation portion accommodating a second terminal electrically connected to the first terminal. The second case has a through hole. The first and second terminals are configured so that, in a process in which the first terminal accommodation portion and the second terminal accommodation portion are inserted to be accommodated in the through hole, the first and second terminals come into contact with each other while sliding on each other and the first and second terminals are elastically deformable upon contact with each other.