Two filed experiments were conducted at the Agricultural Experimental Farm during two seasons, to study some weed control treatments and plant density (distance between plants) on weeds competition in soybean fields. Each experiment included 16 treatments which were the combination of 8 weed control treatments (6 herbicides beside hoeing and un weeded treatment) and two distances between plants namely, 5 and 10 cm (70000 & 140000 plants/fed.). The obtained results showed that the favorite weed control treatments were hoeing (twice) followed by trifurlin and diphenamid in 1st and 2nd season, hoeing (twice) treatment gave the highest decrease in total fresh weight of weeds, followed by pndimethalin, dinitramine and linuron. The total fresh weight of weeds was significantly decreased at 5cm distance between plants as compared with those at 10cm distance. The effect of the interaction between weed control treatments and distance between plants caused a significant effect on fresh weight of weeds. The effect of hoeing (twice) on fresh weight of weeds at narrow plant distance was greater than that at 10 cm distance. No significant difference in fresh weight of weeds were obtained between dinitramin ,linuron, trifluralin and prometryne treatments at 5 cm distance between plants, but this was not the case at the distance 10 cm between plants.