Purpose: The purpose of this study was to provide fundamental data in ensuring a high quality of nursing needed by hospitalized child`s mother through research of the mother`s perception of uncertainty and nursing need concerning child`s hospitalization. Method: 173 hospitalized child`s mothers at G hospital in Busan are questioned. The tools used in this study are PPUS(Parent`s Perception of Uncertainty Scale) and the nursing need of hospitalized children`s mother. The data was analyzed by SPSS/PC program. Results: 1) The perception of total uncertainty for the hospitalized child`s mother showed average 2.37 and the nursing need showed very high level, 3.37. 2) The perception of uncertainty in accordance with general character of the hospitalized child`s mother shows non significant difference 3) Significant correlation indicated between the perception of uncertainty of hospitalized children`s mother and nursing need. Conclusion: It is to be desired to prepare a program which can raise the level of perception developing a method that is able to practically assess and manage the level of perception of hospitalized children`s mother.