  We study the hidden conformal symmetry of four-dimensional extremal
Kaluza-Klein black hole. The scalar Laplacian corresponding to the radial
equation in the near-region is rewritten in terms of the $SL(2,\mathbb R)$
quadratic Casimir. Using the first law of black hole thermodynamics, this
symmetry enables us to obtain the conjugate charges for the CFT side. The
real-time correlators are also found to agree with the CFT expectations.
