This study was carried out to find out an effective formulation for monitoring the soybean podborer, Matsumuraeses falcana (Walshingham), using its sex pheromone in Korea. A 1 : 1 : 1 mixture of (E)-8-dodecenyl acetate (E8-12:Ac), (E,E)-8,10-dodecadienyl acetate (E8E10-12:Ac) and (E,Z)-7,9-dodecadienyl acetate (E7Z9-12:Ac) was an effective composition in monitoring M. falcana. A binary mixture of E8-12:Ac and E8E10-12:Ac was essential to attract M. falcana male moths. E7Z9-12:Ac showed a synergistic effect on the attractiveness of 1 : 1 mixture of E8-12:Ac and E8E10-12:Ac. These chemicals alone showed little or no attractiveness to M. falcana. The sticky-typed wing trap baited with sex pheromone captured significantly more males than the water-pan trap. Trap catches within a soybean field were much more than those in perimeter trap. The trap-baited with sex pheromone gave a distinct fluctuation pattern of male catches throughout the flight seasons. Therefore, it can be expected that pheromone-baited trap provides a simple tool for monitoring the soybean podborer, M. falcana in Korea.