of a unit of a horizontal line the ccd image sensor 13 has an electronic shutter adapted to sweep out the electric charges accumulated in the light receiving elements s odd and s even to a substrate not shown arranged below the light receiving elements s odd and s even thereby sweeping out the electric charges accumulated in the light receiving elements s odd and s even into the substrate so as to control the time period for accumulating electric charges the timing control section 11 has a configuration as specifically illustrated in fig6 and comprises an integrated circuit provided with a synchronizing system circuit block 20 and a transfer system circuit block 30 the synchronizing system circuit block 20 includes an ext vd falling edge detection block 21 a low period pulse width detection block 22 and a vertical synchronizing signal generation block 23 the ext vd rising edge detection block 21 is adapted to detect the falling edge or the front edge of the external synchronizing signal ext vd and comprises first and second d type flip flops 21 a 21 b that are driven to operate by clock pulse signal clk and a nor gate 21 c to which the q outputs of the first and second d type flip flops.