A photoelectric conversion apparatus includes a pixel unit having a plurality of pixels arranged in a matrix, a plurality of block lines to which signals are supplied from the pixels, transfer switches used to supply the signals from the block lines to a common signal line, and a driving circuit configured to drive the pixels, the block lines, and the transfer switches. The block lines have resetting units used to reset potentials of the block lines. With this configuration, a signal reading operation is performed at high speed in the photoelectric conversion apparatus.
