To provide a boron selectively absorbing resin and a removing method of boron capable of surely capturing and removing an extremely trace quantity of boron in water and being utilized for the removal of a ultra trace quantity of boron from ultra pure water used for a semiconductor production process or the removal of a trace quantity of boron from industrial waste water or environmental water.

A boron selectively adsorbing resin is composed of an anion exchange resin carrying a compound having ≥2 phenolic hydroxyl groups and an anionically exchanging site. The boron removing method is by allowing a boron-containing aq. solution to contact with the boron selectively adsorbing resin and by adding the compound having ≥2 phenolic hydroxyl groups and an anionically exchanging site into the boron-containing aq. solution and after that, allowing to contact with the anion exchange resin.