Imaging device and imaging system

An imaging device comprising:

• an imaging unit that includes a plurality of pixels arranged in a matrix shape, in which the plurality of pixels outputs pixel signals;
• a reference signal generation unit that generates a reference signal which increases or decreases with elapse of time;
• m (m is an integer of 3 or more) number of column AD conversion units each of which is arranged for one column or for a plurality of columns of the plurality of pixels;
• and
• a plurality of column delay units that is arranged so as to correspond to two or more and less than m of the column AD conversion units,
• wherein each of the plurality of column delay units includes a first delay circuit in which n (n is an integer of 2 or more) number of first delay units which delay signals are connected,
• a reference clock based on a first clock is input to any one of the n number of first delay units,
• the first delay circuit generates a plurality of first delay clocks, and
• the column AD conversion unit includes
• a comparison unit that compares the pixel signal with the reference signal, and outputs a control signal corresponding to a comparison result,
• a latch unit that includes a plurality of latch circuits that latches the plurality of first delay clocks on the basis of a state change of the control signal, and
• a counter unit that counts a count clock based on the reference clock or a count clock based on any one of the plurality of first delay clocks.