  We study motions of photons in an unmagnetized cold homogeneous plasma medium
in the five-dimensional charged static squashed Kaluza-Klein black hole
spacetime. In this case, a photon behaves as a massive particle in a
four-dimensional spherically symmetric spacetime. We consider the light
deflection by the squashed Kaluza-Klein black hole surrounded by the plasma in
a weak-field limit. We derive corrections of the deflection angle to general
relativity, which are related to the size of the extra dimension, the charge of
the black hole and the ratio between the plasma and the photon frequencies.
