A solid-state imaging device comprising: a pixel section comprising a plurality of pixels arranged in a matrix form, the plurality of pixels performing photoelectric conversion; column signal lines configured to transmit pixel signals output from the pixels in units of columns; an AD converting section comprising a comparator that compares a reference signal serving as a ramp wave (RAMP) with the pixel signals transmitted via the column signal line, said AD converting section being configured to convert a reset level and a signal level of the pixel signals into digital signals independently based on a comparison result of the comparator; a switch connected with the column signal lines and configured to cause the column signal lines to be short-circuited according to a control pulse (VSLCNT) input from a control section; wherein the plurality of pixels are arranged in the pixel section to correspond to a colour filter (fig. 20) in which colours are arranged in a certain repetitive unit (fig. 20), and wherein the switch is connected to each column signal line of pixels of the same colour (G,R,B); characterized in that the control section is configured to turn on the switch according to a gain of AD conversion performed by the AD converting section only during a certain period of time in a period of time in which the comparator is reset and, when the AD conversion gain is set to be high, reduce the pulse width of the control pulse (VSLCNT) so that the distribution of reset levels of the pixels is not widened or, when the AD conversion gain is set to be low, to increase the pulse width of the control pulse (VSLCNT) so that the distribution of reset levels of the pixels is widened. a pixel section comprising a plurality of pixels arranged in a matrix form, the plurality of pixels performing photoelectric conversion; column signal lines configured to transmit pixel signals output from the pixels in units of columns; an AD converting section comprising a comparator that compares a reference signal serving as a ramp wave (RAMP) with the pixel signals transmitted via the column signal line, said AD converting section being configured to convert a reset level and a signal level of the pixel signals into digital signals independently based on a comparison result of the comparator; a switch connected with the column signal lines and configured to cause the column signal lines to be short-circuited according to a control pulse (VSLCNT) input from a control section; wherein the plurality of pixels are arranged in the pixel section to correspond to a colour filter (fig. 20) in which colours are arranged in a certain repetitive unit (fig. 20), and wherein the switch is connected to each column signal line of pixels of the same colour (G,R,B); characterized in that the control section is configured to turn on the switch according to a gain of AD conversion performed by the AD converting section only during a certain period of time in a period of time in which the comparator is reset and, when the AD conversion gain is set to be high, reduce the pulse width of the control pulse (VSLCNT) so that the distribution of reset levels of the pixels is not widened or, when the AD conversion gain is set to be low, to increase the pulse width of the control pulse (VSLCNT) so that the distribution of reset levels of the pixels is widened.