  The relation between the $\gamma$-ray and the emission line luminosities for
a sample of 36 $\gamma$-ray loud blazars is investigated; an apparent
correlation between them, $L_{\gamma} \propto L_{Line}^{0.69\pm0.11}$, with a
correlation coefficient $r=0.741$ and a chance probability of $p =
1.9\times10^{-6}$, is found. It is found, however, that there is no intrinsic
correlation between them: the apparent correlation is due to the redshift
dependence in a flux-limited sample. Thus no evidence is found to support the
argument that the up-scattered soft photons are from the broad emission lines.
Our analysis does not conflict with the SSC model. The disk-jet symbiosis and
radio/$\gamma$-ray correlation found in the literature are also discussed. The
radio/$\gamma$-ray correlation may be an apparent correlation caused by the
boosting effect since both bands are strongly beamed.
