[Objects of study, material and formal, in nursing science]

The use of expression "nursing science" in nursing literature is widespread. The word "science" derives from Latin scientia, that is knowledge. "Knowledge" means to posses a series of learning and cognition learned by the study, the experience or the observation. Every specific area of the knowledge take the name of science. But in what area of the general learn is nursing knowledge interested in? We try to give an answer with this article. We try an epistemological analysis of the interest nursing material object (manperson) and of the formal object: it's still lack a scientific community's agreement on this last. In the end, in last analysis, we try to suppose the epistemological's aim of nursing knowledge as regards to the formal object identified.