Oil painting conservation is a conservation field which is considerably sensitive and requires different fields of specialization from storage to exhibition, from transportation to packaging, from cleaning to retouching. In our country, the fewness of specialists and insufficiency of researches and publications in this field is noticeable and it is observed that the few works that are conducted are not based on scientific foundations. In our museums, many artworks which were subject to false applications by non-specialists or which were harmed because they were not kept in appropriate conditions are encountered. One of these artworks is the oil painting titled "Nu" by one of the important Republican artists, Saip Tuna (1904-1974) found in the storage room of Ankara State Museum of Paintings and Sculptures. In this study, examination and documentation procedures along with conservation and restoration methods carried out with scientific methods on this painting are discussed.