We report the ac magnetic susceptibility, electrical resistance, and X-ray diffraction measurements of platinum hydride (PtH x ) in diamond anvil cells, which reveal its superconducting transition. At 32 GPa, when PtH x is in a P 6 3 /mmc structure, PtH x exhibits superconducting transition at 6.7 K and superconducting transition temperature (T c ) decreases with pressure to 4.8 K at 36GPa. The observed T c is higher than that of powdered Pt by more than three orders of magnitude.It is suggested that hydrides of noble metals have higher T c than the elements. 1 arXiv:1810.08191v1 [cond-mat.supr-con]