This study carried in Batı Akdeniz Agricultural Research Institute (BAARI) for the winter season in 2014-2015 with the purpose of determination of yield characteristics of some grass pea (Lathyrus sativus L.) which were collected from Antalya natural flora. In the field experiments, randomized blocks were created as with three replications, moreover, half of the parcel was harvested for green forage and other half was harvested for seed. In the experiment, 50 % number of flowering days, plant height, green hay yield, dry hay yield, straw yield, biological yield, harvest index, number of pots per plant, number of seeds per pot, seed yield and thousand-seed weight were observed. It was determined that there was a statistically significant difference between the lines. In this study, the earliest flowering was observed on control cultivar. The highest green and dry hay yields were obtained from line number 32. Line number 17 was the best in terms of seed yield. As a result, it was determined that there was a large variability between 45 grass pea lines, and also most of them showed higher yield than control plants. Accordingly, for breeding studies, there are lots of genotypes among lines which were selected as superior and collected from Antalya natural flora.