  We study the rare semileptonic and radiative leptonic B_s decays in the
universal extra dimension model. In this scenario, with a single extra
dimension, there exists only one new parameter beyond those of the standard
model, which is the inverse of the compactification radius R. We find that with
the additional contributions due to the KK modes the branching ratios of the
rare B_s decays are enhanced from their corresponding standard model values and
the zero point of the forward backward asymmetries are shifted towards the
left.
