An imaging apparatus includes a CCD for accumulating an
image signal by an n-times long-time-accumulation (n is an integer of "1" or more); a timing
control circuit for controlling to read out the
image signal accumulated in the CCD according to the n-times long-time-accumulation; a memory for storing the read-out
image signal for one frame period or more; and a recursive
noise reduction circuit for performing a
noise reduction process on the basis of the image
signal read out from the CCD and the one-frame-period-or-more delayed image
signal read out from the memory. In case of the 2n-times long-time-accumulation, in a vertical scanning period in which the image
signal is output from the CCD, the image signal from the recursive
noise reduction circuit is written to the memory. On the other hand, in a vertical scanning period in which the image signal is not output from the CCD, the writing of the image signal generated by the recursive
noise reduction circuit to the memory is inhibited, and the image signal is output as an output signal as it is.