A solid-state image apparatus includes a pixel unit including a plurality of pixels arranged in a matrix, a plurality of amplifiers each provided to each of columns of the pixel unit, and each configured to amplify a signal output from a pixel in the corresponding one of the columns, a plurality of comparison units each provided to each of the plurality of amplifiers, and each configured to compare a level of an output signal from a corresponding one of the plurality of amplifiers with a predetermined threshold value and a control unit configured to control a gain of each of the plurality of amplifiers based on a result of comparing of a corresponding one of the plurality of comparison units.