An imaging lens substantially consists of six lenses, composed of a negative first lens, a positive second lens, a negative third lens, a positive fourth lens, a positive fifth lens, and a negative sixth lens, disposed in order from the object side, and satisfies, when the distance between the first lens and the second lens is taken as Db12, the center thickness of the second lens is taken as D3, the focal length of the second lens is taken as f2, the focal length of the entire system is taken as f, the paraxial radius of curvature of the object side surface of the first lens is taken as R1f, and the paraxial radius of curvature of the image side surface of the first lens is taken as R1r, conditional expressions given below: 1.0