A solid-state image pick-up system having an image pick-up lens for making incident light from a subject form an image on an image pick-up surface, a color separating section for separating the incident light into a plurality of color components at a given period, a solid-state image pick-up device for receiving the subject light separated through the color separating section to convert it into a given subject picture signal, an image pick-up mode selecting circuit for selecting one of a standard mode for picking up a dynamic mode and a high-sensitivity mode for picking up a still picture, and a control section for controlling the period for the color separating section on the basis of the output of the image pick-up mode selecting circuit.