An imaging device includes: an optical system configured to concentrate incident light an image sensor configured to receive the light entering from the optical system and perform photoelectric conversion to generate an electrical signal a flexible printed board on which a signal cable and an electronic component are mounted, the flexible printed board being connected to an electronic pad of the image sensor and a light-shielding member arranged between the optical system and the image sensor, a part of the light-shielding member being folded or bent to be in contact with a side surface of the optical system, and the light-shielding member being configured to shield the light entering from a direction of the side surface of the optical system and/or from between the optical system and the image sensor. The light-shielding member is a board including a circuit layer and electrically conducting with the flexible printed board.
