Surface resistance Rs of YBCO and BSCCO was measured by the cavity method using microstrip line. The Rs values of YBCO thick and thin films and BSCCO thick films were about 40 m-OMEGA, 5 m-OMEGA and 15 m-OMEGA at superconducting state, respectively. The Rs values were approximately proportional to f1.0 approximately f1.4 between 0.5 and 3 GHz.