Photoelectric conversion apparatus and equipment

An inspection method of a photoelectric conversion apparatus including a plurality of pixels and a processing circuit configured to process signals read out from the plurality of pixels, in which each of the plurality of pixels includes a photoelectric conversion element, a first amplification unit which includes an input node to which a signal from the photoelectric conversion element is input and which is configured to output an analog signal obtained by amplifying a signal level at the input node, and a holding capacitor unit which is configured to hold the analog signal output from the first amplification unit and which includes a plurality of capacitor elements, the inspection method comprising:

• a first operation of supplying a predetermined voltage to the holding capacitor unit;
• a second operation of reading out a signal from the holding capacitor unit to which the predetermined voltage is supplied by the first operation;
• and
• a third operation of performing an inspection of the photoelectric conversion apparatus based on the signal read out by the second operation.