Lepton flavor conserving Z -> l^+ l^-$ decays in the general two Higgs doublet model

We calculate the new physics effects to the branching ratios of the lepton flavor conserving decays Z -> l^+ l^- in the framework of the general two Higgs Doublet model. We predict the upper limits for the couplings |\bar{\xi}^{D}{N,\mu\tau}| and |\bar{\xi}^{D}{N,\tau\tau}| as 3\times 10^2 GeV and 1\times 10^2 GeV, respectively.