Soybean(Glycine max.(L.) Merr.) usually aborts about 20 to 80 % of its flowers. This experiment was conducted to expect to abort surplus flowers, to utilize assimilate and then bring yield increase. Figaron(commercial name, Ethyl 5-chloro-3(1H)-indazolylacetate) was used to abort flowers in pot experiment our-of-doors and field experiment with `Enrei` soybean (Maturity Group VI). Figaron was applied at concentrations of 50 and 100ppm at 0, 5, 10 and 15 days after flowering (DAF) in the pot experiment and at concentration of 100ppm at 10 days in the field. Flower number was reduced by the Figaron treatment. The treatments of 50 and 100ppm at 0 and 5 days delayed the second flowering peak until 25 to 39 days after first flowering. Figaron treatments occasionally increased pod number and pod set, but increased or tended to increase seed yield plant^-1 and m^-2.