In this work, we have obtained the decay fraction of the semileptonic B decays () υ l V P B → , where () V P is a Pseudoescalar (Vector) meson and l is the heavy lepton τ . Using the relativistic Quark Model of Wirbel-Stech-Bauer and the non-relativistic Quark model of Isgur-Scora Gristein- Wise), we have obtained the numerical values of the Branching ratios for these decays. Moreover, we establish a comparison between the predictions of these two models.