An aspect of the present invention relates to an optical glass which contains P5+, Al3+, Ba2+, and R2+ (R2+ is one or more selected from the group including of Mg2+, Ca2+, Sr2+, and Zn2+) as essential cationic components and O2− and F− as essential anionic components, the total content of P5+, Al3+, Ba2+, R2+, and R′+ (R′+ is one or more selected from the group including of Li+, Na+, and K+) in the cationic component being 86% or higher, the Al3+/P5+ molar ratio being 0.70 or higher, the Al3+/(Ba2++R2+) molar ratio being 0.40 or higher, and the Ba2+/(Ba2++R2+) molar ratio being in the range of 0.50 to 0.85, and which has an Abbe's number νd of 72 or larger but less than 80, the refractive index nd and the Abbe's number νd satisfying: nd≧2.179−0.0085×νd.