The study aimed to investigate the effect of external electric field on plant height Vicia faba L. cultivar Agabat plants. electric field created within pairs of copper plates forming electric capacitors in a DC current circuit connected to an electric source. The system was designed with two plates areas (225 cm2 and 100 cm2) and different voltages levels. Seeds of V. faba were located within spaces between each capacitor’s plates and are exerted upon by different energy densities. The results showed that when employing a fixed voltage to each of two pairs of capacitor’s plates with areas 225 cm2 and 100 cm2, the increase of plant height was greater when plates with larger areas were used. Generally, when varying values of voltages were employed, plant height increased with the increased voltage (range from 5.9v up to 33.5v). Voltages from 39.5v to 81.5v resulted in a greater decrease in plant height when compared with control plant.