Abstract: This study was carried out in the experimental area of Field Crops Department, Faculty of Agriculture, University of Cukurova, in 1992, to find out the effects of different N doses (0, 5, 10 and 15 kg N/da) on essential oil and quality of sage (Salvia officinalis L.), grown in Cukurova region. As a result of qualitative analysis carried out by using TASS-OVEN thin layer chromotography (TLC), it was observed that essential oils belonging to plants with varied morphological features possessed the same components. In addition, through GC Chromotography analysis, the rates of cineol, bornylasetat, thujon, campher and borneol, which are important components of essential oils, were determined. And it was observed that these components were considerably affected at different N dose applications and had also negative effects on the thujon content, which has an important place in industrial usage.