An imaging lens includes, in order from the object side: a positive first lens group; a stop; a positive second lens group; and a negative third lens group. The first lens group includes, in order from the object side, at least one positive single lens, at least one cemented lens, at least one negative single lens, and a negative meniscus single lens. The second lens group includes, in order from the object side, a cemented lens and a biconvex lens. The third lens group includes, in order from the object side, a negative meniscus lens, at least one negative lens, and at least one positive lens. Focusing from infinity to a close distance is performed by moving the first lens group, the stop, and the second lens group while the third lens group is fixed with respect to an imaging surface.