In an image pickup element, basic array patterns are repeatedly arranged in a horizontal direction and a vertical direction, each of the basic array patterns being made of I×J color filters, the color filters of each of three or more colors being arrayed in a mixed state, an arrangement cycle (I×J) of a basic array pattern is different from an arrangement cycle (2×2) of a sharing configuration pattern, the basic array pattern includes at least one same-color square array pattern which is made of 2×2 color filters of a same color respectively arranged on the 2×2 pixels of the sharing configuration pattern, a characteristic information storage unit stores information on sensitivity calculated from output values of the 2×2 pixels, and a control unit and a digital signal processing unit correct a sensitivity difference between all the pixels of the image pickup element with use of the information on the sensitivity.