A copolymer gel with N,N,N',N'-tetrakis(4-propenyloxy-2-pyridylmethyl)ethylenediamine (TPPEN) and N-isopropylacrylamide (NIPA) is an excellent adsorbent for the recovery of soft metals such as Cd(II). However, it has the disadvantage of deterioration of adsorption rate and capacity with increasing TPPEN content. This problem was solved by a copolymer gel silica composite, in which the polymer gel was coated thinly on the pores of silica particles by a coating method using capillary force. The gel with TPPEN content of 30 mol % was coated with an average thickness of 12 nm on the pores of porous silica with the median pore diameter of 73 nm. The obtained copolymer gel-silica composite showed high adsorption rate and capacity of Cd(II) and was applicable as a chromatographic agent.