The present invention provides a method for measuring a "complex of oxidized LDL and CRP" which comprises using an "anti-CRP antibody". An "anti-apoB antibody and/or anti-.beta.2-GPI antibody" is preferably used in the method of the present invention, which preferably comprises at least a step for forming a sandwich complex represented by "the anti-apoB antibody and/or anti-.beta.2-GPI antibody"-"the complex of oxidized LDL and CRP"-"the anti-CRP antibody". Either the "anti-apoB antibody and/or anti-.beta.2-GPI antibody" or the "anti-CRP antibody" is preferably immobilized on a solid phase. According to the measuring method of the present invention, the "complex of oxidized LDL and CRP" may be simply, promptly and easily measured with high sensitivity, high accuracy at a lower cost.