To achieve an image pickup element that can utilize polarized light as well as non-polarized light to image or capture an object, an image pickup element is provided to an imaging apparatus that forms an image of an object to be imaged onto a light-receiving surface of an image sensor, acquires a polarized filter image together with a regular luminance image, and executes image processing on the acquired images. The image pickup element includes, on a light-receiving surface LRS of the image sensor IMS, a polarizing filter PFL including at least two kinds of pixels having different transmission and polarization properties from each other.