Attractiveness of different amounts of methyl (E,E,Z)-2,4,6-decatrienoate, the aggregation pheromone of brown-winged stink bug, Plautia stali (Hemiptera: Pentatomidae), was tested using different kinds of dispensers. A lure filled with hexane was used as a control treatment. There were no differences in the attractiveness of the pheromone to P. stali and Halyomorpha halys among dispensers (polyethylene-vial, rubber septum, and polyethylene tube). Traps baited with 7, 20, 40, 50, and 60 ㎎ of pheromone were tested for their attractiveness. For females, the 40 ㎎ trap attracted highest number of P. stali, even though there were no significant differences among pheromone amounts. For males, the 40 and 50 ㎎ traps attracted significantly more bugs than the 7, 20, and 60 ㎎ traps and the control traps. Based on these results, the pheromone dispenser impregnated with 40 ㎎ of pheromone will be practical in monitoring P. stali in the field.