IMAGING DEVICE

There are provided: a pixel separation section including an insulating film and extending in first and second directions between pixels and extending from a first surface of a semiconductor substrate toward a second surface; pixel transistors provided on the second surface side, arranged in the first direction to overlap the pixel separation section extending in the first direction in plan view, constituting a readout circuit that outputs a pixel signal based on electric charge outputted from each of light-receiving pixels; and an element separation section including an insulating film formed to be embedded on the second surface side, extending in the first direction along the pixel transistors arranged in the first direction, being divided at at least a portion of an intersection of the pixel separation section extending in the first and second directions in plan view, and electrically separating the pixel transistors and light-receiving sections from each other.