The imaging lens substantially consists of a first lens group having a positive refractive power and a second lens group having a positive refractive power, in which the entire second lens group moves along the optical axis to perform focusing. In the imaging lens, the first lens group comprises a positive first lens, a negative second lens, a negative third lens, a positive fourth lens, and a positive fifth lens in this order from the object side. When the Abbe number of the second lens with respect to the d-line is νd2 and the Abbe number of the third lens with respect to the d-line is νd3, conditional formula (1) below is satisfied: 2.0