This study was performed to identify the essential structures and meanings of sleep disorder experience of shift work nurses. Giorgi"s phenomenological methodology was used for study. Data were collected from ten nurses having sleep disorder with individual in-depth interviews and analyzed with the procedures suggested by Giorgi. The essential structures of the experience were constructed with 176 meaning units, 40 essential psychological meanings, 14 sub-constituents and seven constituents. The constituents were sleep disorder due to the tight nursing tasks, body and mind being broken, destructed life, suffering not empathized, concern about threat to patient care, making a breakthrough and accepting sleep disorder as a fate of nurses and withstanding. The results indicated that the mind and body of shift work nurses suffering sleep disorder have been broken down and the lives of them were destructed. Their sufferings were not empathized even from their co-workers or organization. However they concerned about the sleep disorder results into the mistakes in their nursing works. They tried to accept their sufferings as fates of shift work nurses and search various ways to withstand sleep disorder. Strategies to solve the problems associated with sleep disorder of shift work nurses are necessary in organizational level.