  We analyze the semileptonic $B\to K_2^*(1430)l^+l^-$ transition in universal
extra dimension model. In particular, we present the sensitivity of related
observables such as branching ratio, polarization distribution and
forward-backward asymmetry to the compactification factor (1/R) of extra
dimension. The obtained results from extra dimension model show overall a
considerable deviation from the standard model predictions for small values of
the compactification factor. This can be considered as an indication for
existence of extra dimensions.
