Upon the recent progress of numerical modeling techniques, prediction of DNAPL transport and its application to field sites have posed the possibility of remediation and measures against groundwater contamination. In the study, a coupled TVD finite difference with the random walk model is applied for analyzing migration of dissolved and undissolved DNAPL with entrapment. The mechanism of DNAPL fingering and dispersion processes is illuminated and simulated on numerical analyses. As a resulte, the validity of the proposed model is well confirmed based on laboratory experiments and filed site data.