An image-capturing device includes a solid-state image-capturing device in which a first substrate and a second substrate are electrically connected through connection units. The image-capturing device includes: a pixel unit in which a plurality of pixels, each of which has a photoelectric conversion element for generating a photoelectric conversion signal according to an intensity of incident light disposed on the first substrate, are disposed in a two-dimensional matrix and configured to output a photoelectric conversion signal generated by each of the pixels as a pixel signal for every row; a plurality of signal processing units, each of which is disposed for every one or more columns of the plurality of pixels provided in the pixel unit, performs predetermined signal processing on the pixel signal output from the pixel of a corresponding column, and outputs a processed signal including a plurality of signals after the signal processing is performed.