<p>A column packing material comprises a porous support coated with a silicone polymer having an Si-R bond, wherein R is a hydrocarbon group having 1 to 18 carbon atoms, and an Si-R min bond, wherein R min is a hydrophilic group having one or more of polyoxyalkylene group or hydroxyl group, at the terminal end. The column packing material can be produced by: modifying a porous support by bonding hydrocarbon groups to the porous support; eliminating a part of the hydrocarbon groups from the modified porous support; and modifying the porous support by bonding hydrophilic groups thereto.</p>
