An object is to provide a solid-state imaging apparatus capable of causing driving signals of pixels to reach the entire screen and of driving all the pixels. The solid-state imaging apparatus includes a pixel region including a plurality of pixels therein, each pixel having a photoelectric conversion element and at least one transistor, and a plurality of driving lines, each driving each of the plurality of transistors arranged in the pixel region, wherein the driving line supplies a driving signal through a buffer arranged in the pixel region to the transistor, and the number of the buffers is smaller than the number of the pixels.