An imaging device includes: pixels arranged in m rows by n columns; a first comparator that generates a first output signal indicating a result of comparison between a first pixel signal outputted from each pixel located in an ath column among the pixels and a reference signal; a first counter that generates a first digital signal by counting a period from start of a first counting period to inversion of the first output signal; and a first control circuit that determines, in accordance with a magnitude correlation between the first digital signal obtained from a first pixel located at the ath column and a bth row and a threshold, a period in which the first clock signal is supplied to the first counter in the first counting period of a second pixel located at the ath column and a cth row different from the bth row.