The purpose of this study is to understand the relation of peer group caring interaction, Professional self-concept, and Nurses’ Retention. The subjects of this study are 133 nurses who have worked for more than three months at five general hospitals with more than 300 beds in S city. As a result of the study, nurses’ retenstion was higher than those of under 25 years of age between 30 and 35(F=3.313, p=.039).The professional self-concept of hospital nurses has been identified as an influence factor of intent to serve. Professional self-concepts have been shown to be better with higher peer-care and consideration(r=.397, P=.004). The peer group caring interaction behavior can occur not only between colleagues but also between managers. Therefore, it is necessary to proceed with the manager's group caring interaction as a follow-up study.