A progressive power lens belonging to a series of lenses according to the present invention is provided. If a first lens and a second lens randomly chosen from the series of progressive power lenses have a common spherical refractive power Sph nulldiopternull in the distance portions thereof, the Sph is greater than or equal to null1, and a base curve BC1 of the first lens is smaller than a base curve BC2 of the second lens, the first and second lenses satisfy a condition: 1 Wds null ( BC 1 , Sph ) Wns null ( BC 1 , Sph ) Wdt null ( BC 1 , Sph ) Wnt null ( BC 1 , Sph )