An image capturing device includes an image capturing element that performs photoelectric conversion of light from an object and outputs a pixel signal, a lens unit that forms images on the image capturing element based on light from the object, and an optical shift mechanism that displaces optical images formed on a light-receiving surface of the image capturing element relative to the image capturing element. The optical shift mechanism has an optical member provided with a parallel plate that is inclined at a predetermined angle with respect to the optical axis of the lens unit and rotated around the optical axis. The optical member is provided in a fluid having a higher refractive index than a refractive index of air.