  In this paper, we investigate the localization of a bulk gravitino field on
the scalar-tensor branes and compare the result with that in the
Randall-Sundrum-1 (RS1) model. The coupled chiral equations for the
Kaluza-Klein (KK) modes of the gravitino field are obtained by fixing the gauge
$\Psi_5=0$ and using the chiral KK decompositions. It is shown that, in the RS1
model for the left- and right-handed zero modes of the gravitino field, only
one of them can be localized near one brane. For the massive modes, both chiral
modes survive and the lower KK modes are localized near the IR brane from the
four-dimensional physical coordinate point of view. However, for the
scalar-tensor brane model, the localization of the gravitino chiral zero modes
depends on the coupling parameter $\lambda$, and they will be not localized
around anyone brane within a certain range of the parameter $\lambda$, which is
quite different from the RS1 model. Furthermore, we also give the corresponding
mass spectra of the massive KK gravitinos in the scalar-tensor model.
