The influences of two composts treatment on three pea (Pisum sativum L.) cultivars were studied. The experiments were conducted in the plastic house at the agriculture research center, Ministry of Agriculture in Iraqi Kurdistan region. This study was performed during 14-11-2011 till 29-3- 2012. Two types of composts were studied; the local compost and soil conditioner Latvia compost. Three cultivars of pea (Lincoln, Rondo and Sonata) were treated with various levels of the two mentioned composts (12 parts silt soil, 8 parts of silt soil: 4 parts of the compost and 4 parts silt soil: 8 parts of compost. In the local compost and Latvia compost experiments the highest levels of shoot length, dry weight of shoots and 100 seeds were obtained in Rondo cultivar, and number of branches and seeds/ plant and number of seeds/ pod were recorded from Sonata cultivar. However, the highest levels of most field parameters were obtained in the level 8:4 in both composts, with no significant effects of soil conditioner on shoot length and dry weight of 100 seed. In both experiments the interaction between Rondo cultivar and silt soil gave highest shoot length, and highest dry weight of shoots and 100 seed were obtained in the interaction of Rondo cultivar and the level 8:4. While the highest number of branches/ plant, number of pods/ plant and number of seeds/ pod were recorded from the interaction between Sonata cultivar and the level 4:8 of local compost, and the effects of local compost were more than soil conditioner in different interactions. However, in local compost experiment the highest value of potassium% in the dry seeds was obtained from the interaction between Sonata cultivar and silt soil. However the highest value of the phosphorus% and potassium% were evaluated from the interaction of Sonata cultivar with the level 4:8 and silt soil respectively in the Latvia compost experiment