[SUMMARY] Aims : To clarify the characteristics of ethical issues faced by municipal public health nurses during a natural disaster. Methods : We analyzed the literature of practice reports by the municipal public health nurses affected by the disaster. We focused on the characteristics of the nature of the confrontational structure included in the ethical issues and the features of the period during the long period of the reconstruction support period immediately after the disaster. The definition of ethical issues was “an event that has a conflicting structure in which there are multiple legitimate actions, judgments, values, and interests and involves conflicts in making decisions about the performance of nursing practice.” Results : We reviewed 34 documents and identified 11 categories as ethical issues including “Internal conflict between duty as public health nurse and own values and beliefs” “Imbalance in the provision of health care and welfare services to the growing and diversifying needs” “Difficulties in establishing a disaster support system including support organizations inside and outside the region”. Conclusions : The characteristics of the conflict structure included in ethical issues are : “Conflict between concepts that exist in the deep core of public health nurses” “Conflict with the concept of nursing practice ability cultivated by public health nurses in normal times” “Conflict with the concept included in surrounding factors related to the development of nursing practice in a disaster”. The period when ethical issues occur is not only in the acute phase but also in the mid-to-long term, such as regional disparities in the health of residents during the reconstruction period.