IMAGING ELEMENT AND IMAGING DEVICE

A time required for resetting a pixel is shortened. An imaging element includes a plurality of pixel blocks each including a plurality of pixels each including a photoelectric conversion unit and a charge transfer unit, a charge holding unit that holds a charge transferred by the charge transfer unit, a reset unit, and an image signal generation unit that generates an image signal according to the held charge, an auxiliary charge holding unit that couples to the charge holding unit of each of the plurality of pixel blocks; and a coupling unit that is disposed for each of the plurality of pixel blocks and couples the auxiliary charge holding unit to the charge holding unit, in which the image signal generation unit generates the image signal in each of a high sensitivity mode in which the auxiliary charge holding unit and the charge holding unit are not coupled and a low sensitivity mode in which the auxiliary charge holding unit and the charge holding unit are coupled, the coupling unit causes conduction between the charge holding unit and the auxiliary charge holding unit in a low sensitivity mode, an own pixel block charge holding period, and a charge non-holding period, and the reset unit performs the reset in the low sensitivity mode and the charge non-holding period.