Abstract: The present invention relates to a primary color forming circuit for a complementary color CCD in which complmentary color pixels are arrayed in a predetermined pattern to form lines which have the same pattern as every other line. The output of one line is delayed by one line drive period and combined with the output of the next line to form source signals. Pseudo primary colors are obtained by combining these source signals with appropriate coefficients. Therefore, the present invention provides an image pickup apparatus which has advantages of both a complementary color filter CCD and a primary color CCD.