The objective of this study is to find antioxidant compounds which are contained in methanol extract of Glycine max Detam 1 variety from Ultrasound extraction method. Extraction has done by two solvents; ¬n-hexane solvent to eliminate the soy fat which can affect the analysis result and methanol 80% to take the active compounds in soybean. The result of extraction was concentrated by using Rotary evaporator (BUCHI Rotavapor R-114) and BUCHI Water bath B-480. As the result of this study, there were three antioxidant compounds detected, i.e. Methyl-10-trans,12-cis-octadecadienoate, Methyl 9-cis,11-trans-octadecadienoate, and 9,12-Octadecadinoic acid.