The purpose of this study is register the opinion of nurses on the compatibility of the Nursing Information System with the provision of nursing care, and the ease of learning of the subsystem. This paper is an empirical study that was conducted using a questionnaire in Cancer and Oncology Hospital "Agios Savvas". Specifically, 121 nurses (108 women and 13 men) of all education levels participated in the survey. According to user responses, 86% agreed partially that the subsystem was easy to learn, and 40.5 % of this 86% believe that the clinical subsystem adequately supports nursing care, mainly engaged in designing the necessary processes, and followed by reducing errors. In conclusion, we can consider that the use of information systems in nursing is important for improving clinical practice and quality of patient care.