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¹ Aksaray Üniversitesi Güzelyurt Meslek Yüksekokulu Güzelyurt /Aksaray
² Ankara Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümü Dışkapı /Ankara - This research was conducted to find out the effects of different sowing time on yield and yield components for winter rape during growing seasons of 2012 and 2013 (September 2012 – June 2013). The experiment was designed in randomized complete block design with 3 replications and carried out in the experimental plots of Field Crops Department of Agricultural Faculty of Ankara University. Winter rape variety Capitol was sown in five different sowing time (September 2, September 16, September 30, October 14 and October 28). Observations and measurements for plant height, lateral stem number, capsule number on main stem, seed number per capsule, thousand seed weight, seed yield, oil ratio and oil yield were made. According to the results of the study; the differences were statistically important for all characters in the experiment. The longest plant stem height (158.2 cm), the highest lateral branch number (6.73), capsule number in main stem (47.53), number of seed per capsule (29.03), thousand seed weight (2.85 g), seed yield (246.70 kg da-1) were determined in at the earliest sowing time. The highest oil ratio (45.0 %) and oil yield (107.20 kg da-1) were similarly obtained in the earliest sowing date (September 2). Delayed sowing resulted in decreasing of oil ratio. The best sowing time for winter rapeseed was at the beginning of September under Ankara conditions. Keywords : Rapeseed, Brassica napus ssp. oleifera L.,sowing time, seed yield, oil ratio