Method of producing purified aqueous solution of hydrogen peroxide

A method of producing a purified aqueous solution of hydrogen peroxide which comprises the step of contacting an aqueous solution of hydrogen peroxide containing organic impurities with a hydrophilic porous resin having a specific surface area of not less than 800 m.sup.2 /g to remove the organic impurities in the aqueous solution of hydrogen peroxide, said hydrophilic porous resin being an adsorbent resin having no ion exchange group and containing 1 to 40 wt % of organic groups selected from the group consisting of hydroxyl groups, chloroalkyl groups, and hydroxyalkyl groups.