The importance of protection of reliance on the administrative subject has been realized increasingly. There is a consensus to absorb protection of the reliance into the legislation of administrative procedure. However, there are still some issues on protection of the reliance to be perfectly resolved so as to play its due role. Such as in the legislation of administrative procedure, whether protection of the reliance should be treated as a norm of law or as a principle of law or as an aim of the legislation, whether protection of the reliance includes procedural protection except for substantive protection, whether balance is required between the reliance and the public interest, whether time limit should be put on the requisition right, and so on.