This research was to investigate the relation between some of yield resistance and yield components of 7 foreign pea genotypes in comparison with Ascochyta complex. After implant, the plants were sprayed in a flowering stage with the aid of suspension of spore A. complex with concentration of 107 spores at 10 ml per plant. After harvesting, measurements of different characterizations, distance of the first pod of ground, number of seeds per pod, number of pods per stem, number of seeds per stem, number of seeds per plant, pod length, weight 100 Seed dry weight, number of pods per plant, seed weight per stem, dry grain yield (economic yield), biological yield and harvest index in field conditions were performed a complete randomized design with 4 replicates under field conditions. Then data analysis and mean comparisons was done by using SAS software and LSD test. According to the results survey all characterizations in the 7 tested genotypes, it can be said that A. complex decreased the yield and yield components significantly. In terms of pod length, 100 seed weight, seed weight in the lateral stem of the Italian and Wando genotype was the highest and the lowest respectively. According to characterizations of number of pods per plant, grain yield, biological yield and harvest index had the highest mean of Mediterranean and Greenarraw genotypes. There was no significant difference in genotypes for the characterizations of the distance of the first pod of ground, number of seeds per pod, number of pods per stem, number of seeds per stem and number of seeds per plant.