Abstract: To provide a wide-angle lens having a four-group, five-lens configuration and capable of increasing an angle while maintaining productivity of a second lens and an object-to-image distance of an entire lens system is reduced. A wide-angle lens has a four-group, five-lens configuration. A second lens, a third lens, a fourth lens, and a fifth lens are plastic lenses, and the fourth lens and the fifth lens constitute a cemented lens. A refractive index n1 of the first lens is 1.839, which satisfies the following conditional expression (1), 1.800<n1??Conditional expression (1), As a ratio between a focal length f2 of the second lens and a focal length f0 of an entire lens system, f2/f0 is ?2.680, and satisfies the following conditional expression (2), ?3.000<f2/f0<?2.500??Conditional expression (2).