This invention provides an optical element for correcting a chromatic
aberration corresponding to a short wavelength of a light source and
further provides an optical pick-up device having the optical element for
correcting a chromatic aberration and adapting for a further higher
recording density and larger capacity of the optical recording medium, the
optical reproducing device and the optical recording and reproducing
device. The optical element for correcting a chromatic aberration arranged
between a light source such as a semiconductor laser or the like with a
wavelength being 440 nm or less and an objective with numerical aperture
NA being 0.55 or more, a focal distance being 1.8 mm or more and an Abbe
number at the d-line (587.6 nm) being 95.0 or less has a convex lens with
at least an Abbe number at the d-line being 55 or more and a concave lens
with an Abbe number at the d-line being 35 or less.