an image pick - up apparatus and an image pick - up system constructed to prevent occurrence of random noise in a photographed image due to a random noise component produced in a reference supply circuit . an image pick - up apparatus has an area sensor driven by matrix driving , and a reference supply circuit for supplying a reference voltage for driving of the area sensor , and the reference voltage is supplied through a low - pass filter coupled to the reference supply circuit . further , a cutoff frequency of the low - pass filter is preferably determined so that an effective value of noise of the reference voltage having passed through the low - pass filter becomes not more than one - tenth of an effective value of random noise produced in pixels of the area sensor .