The purpose of this study is to analyze and explain the substance of psychiatric nurses` experiences in nursing care of client with auditory hallucination. Research methodology of Straus & Corbin`s grounded theory were applied as qualitative research methodology was deemed to be necessary to understand and grasp the essentials of experiences the psychiatric nurses have while nursing cases of auditory hallucination. The causal conditions of psychiatric nurses` nursing experience as to auditory hallucination shown in grounded data were `patient`s auditory hallucination`, and the context that appeared in psychiatric nurses` experience in nursing care of client auditory hallucination was the `phase` and `type` of patient`s auditory hallucination. The central phenomenon of psychiatric nurses` nursing the cases of auditory hallucination was `a feeling of powerlessness`, and the intervention conditions that appeared in connection with psychiatric nurses` experience in nursing cases of auditory hallucination were `the relationship of trust with patient` and `patient`s recognition of his/her own disease`. In order to get out of the feeling of powerlessness or relieve a patient from pain or alleviate pain, psychiatric nurses use various strategies such as `to divert attention, to accept, to grope effective method of nursing, to provide the sense for the real, to give a linguistic stimulus, to provide information, to promote the perception of self, to entreat, to administer a medicine, and so on`. Consequently, psychiatric nurses get results such as `to demand continuance education, to try to find effective method of nursing, to give themselves up to force of habit, and so on`.