A solid-state imaging device according to the present invention includes, on an imaging surface, a plurality of unit pixel regions being arrayed at a first pixel pitch along a Y direction and at a second pixel pitch along an X direction. One of two adjoining unit pixel regions 1 along the Y first direction includes a first photodetecting portion 1a having a first opening ratio, and the other includes a second photodetecting portion 1b having a second opening ratio which is lower than the first opening ratio. When the first photodetecting portion 1a is moved imaginarily by a first pixel pitch along the Y direction, the first photodetecting portion 1a covers the entire second photodetecting portion 1b. At this time, a portion of the first photodetecting portion 1a that does not cover the second photodetecting portion 1b functions as an imaginary third photodetecting portion. From a difference between signals output from the photodetecting portions 1a and 1b, an imaginary pixel signal which is in accordance with an amount of light entering the imaginary third photodetecting portion is obtained.