Infrared spectroscopy of molten LiCl-KCI eutectic melt under several hydrogen pressures at 673 K provided an absorption band in the wavenumber region of 1300-1600 cm(-1). This absorption band is ascribed to the vibration of a Li-H interaction in the melt. On the other hand, the absorption bands ascribed to a K-H interaction and H-Cl interaction were not observed. The existence of the Li-H interaction shows a strong attractive force between dissolved hydrogen atoms and Li+ ions in the melt.