Solid-state image pickup apparatus

A solid-state image pickup apparatus comprising:

• a plurality of two-dimensionally arrayed unit pixels, each of the unit pixels including an optical-electrical conversion element performing optical-electrical conversion of an incident light;
• a charge conversion element and an output terminal provided for each of a plurality of pixel groups, each pixel group including one or more of the unit pixels, the charge conversion element converting a signal charge optical-electrical converted by the optical-electrical conversion element of each of the unit pixels in the pixel group to voltage or current, and the output terminal being capable of outputting a noise signal that occurs at the time of resetting the charge conversion element and a signal-noise sum signal obtained by adding a signal that has occurred by optical-electrical conversion to the noise signal separately;
• a plurality of first transfer lines to which the output terminals of a plurality of the pixel groups are connected in common, the plurality of first transfer lines being capable of holding voltages based on signals outputted from the output terminals;
• a plurality of second transfer lines provided in parallel with the first transfer lines, the plurality of second transfer lines being capable of holding a voltage;
• inter-transfer-line capacitive elements connecting the second transfer lines and the first transfer lines;
• a reset switch resetting each of the second transfer lines to a reset voltage;
• a readout switch provided for each of the second transfer lines;
• and
• a third transfer line to which the second transfer lines are connected in parallel via the readout switches, respectively.