A method of casting a plurality of caliper forms by using a mold and a core member of a special design is presented. The core member 20 has axial sections 22A, 22B formed on its each end aligned parallel to each other, and the middle section 21 between the axial sections is provided with a depression section 24A for forming a teeth section 9 of the caliper form 17A. Between the depression section 24A and the axial section 22A, there is a depression section 24B opposing the depression section 24A for forming the other teeth section 9 of the other caliper form 17B. There are internal surface forming sections 27A, 27B for forming the internal surfaces of the disc pass sections 8, respectively, between the axial section 22A and the depression section 24A, for the caliper form 17A and between the axial section 22B and the depression section 24B for the caliper form 17B. This structure of the core member 20 enables to produce two caliper forms 17A, 17B with the use of one core member 20, and the configuration, of arranging the depression section 24B disposed between the depression section 24A and the axial section 22A, allows the middle section 21 to be made short, thus saving the material cost. The overall approach of the invented method contributes significantly to the efficiency of production of the caliper forms compared with the conventional approach.