Two field experiments were conducted at the Agricultural Research and Experiment Center, Faculty of Agriculture at Moshtohor, Kalubia, Egypt, during 1985 and 1986 seasons. The aim of the investigation was to study the efficiency of some herbicides in controlling soybean weeds, The applied herbicides as well as hoeing treatment decreased significantly the fresh and dry weight of grass, broad—leaved and total weeds after 60 and 90 days from soybean sowing compared with un-weed treatment except Lasso (2.0 L.), AC (0.315 L) + surfactant, Scepter (1.05 L.), Stomp (1.7 L.) and Afalon S (1.0 kg/fad.) on broad—leaved weeds in the first period (60 days). The superiority of the herbicides in controlling weeds after 60 days was obtained from AC (0.42 L.), Amex (2.5 L.), hoeing, AC (0.315 L.) + surf actant and Scepter (0.7 L.) + Stomp (1.25 L./fad.). On the other hand herbicides with low efficiency were Afalon S (1.0 kg), Scepter (1.05 L.) and Lasse (2.0 L./fad.). After 9’ days from sowing, weed reduction over 70% was found by hoeing, AC (0.42 L.), Amex (2,5 L.), AC (0.21 L.), AC (0.315 L.), AC (0.315 L.) + surfactant and Ronstar (2.0 L./fad.); reduction between 55 and 70% was by Scepter (0.7 L.) + Stamp (1.25 L.), Lenamex (3.5 L.), Ronstar (1.5 L.), Lasso (1.5 L.) + Linuron (0.75 kg) and Lasso (2.0 L./fad.), reduction of less than 55% was by Scepter (1.05 L.), Stomp (1.7 L.) and Afalon S (1.0 kg/fad.)