An imaging device, comprising: a plurality of pixels arranged in rows and columns, the plurality of pixels including a first pixel and a second pixel (21-2, 21-3); a first signal line coupled to the first pixel; a second signal line (23-2, 23-3) coupled to the second pixel (21-2, 21-3); a first comparator; a second comparator; and a switch circuit configured to couple the first signal line to the first comparator and the second comparator, and couple the second signal line (23-2, 23-3) to the first comparator and the second comparator; wherein the switch circuit is configured to operate in a first mode in which the switch circuit connects the first signal line to the first comparator and connects the second signal line (23-2, 23-3) to the second comparator, and configured to operate in a second mode in which the switch circuit switches between at least connecting the first signal line to the first comparator and connecting the first signal line to the second comparator and in which the switch circuit switches between at least connecting the second signal line (23-2, 23-3) to the second comparator and connecting the second signal line (23-2, 23-3) to the first comparator; wherein the imaging device further comprises a third comparator, wherein the first pixel, the second pixel (21-2, 21-3), the first comparator, the second comparator and the third comparator are associated with a same column of the imaging device, wherein when the switch circuit is configured to operate in the second mode in which the switch circuit switches between at least connecting the first signal line to the first comparator and connecting the first signal line to the second comparator, the switch circuit is configured not to connect the first signal line to the third comparator at least when the switch circuit operates in the second mode, based on stored inspection information regarding the third comparator which has poor characteristics; wherein the first mode is a parallel mode and the second mode is a sequential mode; and wherein the first mode has higher speed than the second mode, and the second mode has lower power consumption than the first mode. a plurality of pixels arranged in rows and columns, the plurality of pixels including a first pixel and a second pixel (21-2, 21-3); a first signal line coupled to the first pixel; a second signal line (23-2, 23-3) coupled to the second pixel (21-2, 21-3); a first comparator; a second comparator; and a switch circuit configured to couple the first signal line to the first comparator and the second comparator, and couple the second signal line (23-2, 23-3) to the first comparator and the second comparator; wherein the switch circuit is configured to operate in a first mode in which the switch circuit connects the first signal line to the first comparator and connects the second signal line (23-2, 23-3) to the second comparator, and configured to operate in a second mode in which the switch circuit switches between at least connecting the first signal line to the first comparator and connecting the first signal line to the second comparator and in which the switch circuit switches between at least connecting the second signal line (23-2, 23-3) to the second comparator and connecting the second signal line (23-2, 23-3) to the first comparator; wherein the imaging device further comprises a third comparator, wherein the first pixel, the second pixel (21-2, 21-3), the first comparator, the second comparator and the third comparator are associated with a same column of the imaging device, wherein when the switch circuit is configured to operate in the second mode in which the switch circuit switches between at least connecting the first signal line to the first comparator and connecting the first signal line to the second comparator, the switch circuit is configured not to connect the first signal line to the third comparator at least when the switch circuit operates in the second mode, based on stored inspection information regarding the third comparator which has poor characteristics; wherein the first mode is a parallel mode and the second mode is a sequential mode; and wherein the first mode has higher speed than the second mode, and the second mode has lower power consumption than the first mode.