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,　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.