In order to understand the mechanism of internal surfactants as anti-static agents on polymer surfaces, surface specific resistivity measurement and secondary ion mass spectroscopy (SIMS) were used for characterization of an anti-static agent containing alkylamine surfactant (DEA) in polypropylene (PP) sheet. In this study, deuterium-labeled DEA was used as a model compound and secondary ions emitted from the labeled isotope were detected. We showed the depth profile and imaging of the DEA on the PP surface. We clarified the anti-static mechanism, and concluded that adding alcohol to the antistatic agents accelerates the ooze and diffusion of DEA, resulting in a high anti-static effect on the PP surface.