To actualize a wide-angle type photographic optical system which has short lens overall length, a small front-lens diameter, and excellently compensated distortion aberration while the distance between an exit pupil position and an image plane is made long.

The photographic optical system comprises a 1st group which is more on the object side than a stop and a 2nd group which is more on the image side than the stop; and the 1st group is composed of a biconcave lens L1 and a biconvex lens L2 and has positive power on the whole and the 2nd group is an optical system which is composed of a cemented lens L34 formed by cementing a positive lens L3 and a negative lens L4 in order from the object side and a biconvex lens L5 and has positive on the whole.