A zoom lens system capable of satisfactorily compensating for aberration, including, in an order from an object to an image, a first lens group having a negative refractive power, an aperture, and a second lens group having a positive refractive power, wherein the first lens group including a first lens, a second lens, a third lens and a fourth lens in the order from the object to the image, and wherein an Abbe number of the first lens is less than 30, an Abbe number of the second lens is greater than 45 and less than 65, and a ratio of an Abbe number of the third lens to an Abbe number of the fourth lens is greater than 3.8 and less than 4.3.