Comparative tests of the Vickers hardness and Knoop hardness of amorphous plating films were made using standard hardness blocks and a microhardness tester. It was found that there were differences in the interrelationship between the HV and HK values, depending on the standard blocks used and the films tested. Accordingly the configurations of cross sections were compared to elucidate differences in load dependence and the interrelationship between HV and HK values related to whether the strucutre was crystalline or amorphous. An investigation was also made of the changes in the hardness of amorphous Ni-P films with heat treatment.