Hospitalization is a life experience cause stress and these stress was indicated human character to confront with multiple factors. This study was designed to identify admission experiences of the patients in the hospital. The findings are expected to contribute to the development of a nursing theory helpful to nursing practice. The subjects were 8 patients. Data were collected by recording and transcribing interviews and analyzed in the framework of grounded theory as mapped out by Strauss and Corbin(1998). The core category in the analysis of the phenomenon of patient`s admission experience was "unfamiliarity". In the process of data analysis, 173 concepts, 42 subcategories were identified, These subcategories were again grouped into 11. 4 hypotheses were confirmed as follows : 1) The subjects tend to use all available strategies including positive, negative and emotional coping strategies and get stabilized if the decision for hospitalization was made by others; if the state of ailment is serious ; if the ward environment is unfavorable; if the medical staff are unkind and arrogant but they have abundant supportive system. 2) The subjects tend to adopt a positive coping strategy and get stabilized if the decision for hospitalization was made by others; if the state of ailment is acute but not serious; if the ward environment is favorable and the medical staff are kind. 3) The subjects tend to rely on a negative coping strategy and get frustrated if the decision for hospitalization was made by themselves; if the state of ailment is serious; if the ward environment is unfavorable and the medical staff unkind, if they have scanty supportive system. 4) Some of the subjects tend use a positive coping strategy and get stabilized but the others tend to rely on a negative coping strategy and get frustrated; if the decision for hospitalization was made by others; if the state of ailment is chronic; if awkwardness is not intense and the ward environment is favorable and medical staff are kind though they have scanty supportive system.