To develop the non-destructive analytical method for oils adsorbed on insulating wipers using soft X-ray absorption spectroscopy with a total-electron-yield (TEY) method, TEY-XANES spectra of various liquid unsaturated fatty acids adsorbed on the insulating wipers of Kimwipe^® (denoted by KW) were measured in BL10 at NewSUBARU. Fraction of the fatty acid and KW were >75% and <25%, respectively, in the TEY-C K-XANES of fatty acid adsorbed on KW. In the TEY-O K-XANES, fraction of fatty acid and KW was approximately 50% each. Such the difference of fraction between C K and O K regions can be explained by the difference of detection depth of TEY in C K and O K regions. Considering the detection depth, XANES of oil compounds can be extracted from TEY-XANES of the oil compounds adsorbed on insulating wipers.