The present investigation was conducted in the farm of Sakha Agricultural Research Station, Kafr El-Sheikh Governorate during 2015/ 16 and 2016/ 17 to determine the influence of sowing dates on the major piercing-sucking insect pests which infested faba bean and soybean plants. On faba bean plants, Emposca spp. ranked in the first category with the highest average number in October cultivated (60.35 ± 12.08 and 89.55 ± 11.29 indiv.) followed by M. persicae (37.30 ± 12.08 and 61.85 ± 12.74 indiv.) in both seasons, respectively. Meanwhile, in November implanted A. craccoivora was recorded the highest average number (72.85 ± 23.86 and 270.45 ± 80.49 indiv.) followed by Emposca spp. (51.15 ± 7.76 and 69.25 ± 12.73 indiv.) in the two successive seasons, respectively. While, in December grown Emposca spp. came in the first category (53.30 ± 10.90 indiv.) in the first season and M. persicae observed the first category (63.35 ± 10.95 indiv.) during the second season. P. solenopsis was found the lowest average number in the different planting dates at the two successive seasons. On the other side, on soybean plants, A. gossypii arranged in the first category in the three plantations and observed the highest average number in the June plantation with values (248.80 ± 48.58and 332.45 ± 67.77 indiv.) followed by April plantation(149.05± 36.08 and 172.10 ± 38.93  indiv.) and May plantation (117.35 ± 26.67 and 167.4 ± 34.44 indiv.)in both seasons, respectively. Number of  B. tabaci came in the second category in the three cultivated with the highest values in the June plantation with (216.50 ± 45.11 and232.5 ± 53.36 indiv.) followed by April plantation(143.85 ± 30.77 and 172.00 ± 32.97 indiv.) and May plantation  (63.05 ± 15.69 and 87.05 ± 19.10 indiv.) during the two successive seasons, respectively.