An imaging device (10) is configured by being provided with an image pickup element (40) where an imaging surface (41) having a concave surface facing an object side is formed, an imaging optical system (20) which forms an image on the imaging surface (41) in a range smaller than the imaging surface (41), and an oscillating drive section (30) which oscillating-drives the imaging optical system (20) so that a direction of an optical axis Z of the imaging optical system changes. The imaging element (40) captures a first formed by the imaging optical system (20) with a direction of the optical axis Z set to a first direction and a 2nd formed by the imaging optical system (20) with a direction of the optical axis Z set to a 2nd direction, in different regions in the imaging surfaces (41).