A new compound Bi2InTaO7 was synthesized by solid-state reaction and characterized by powder X-ray diffraction and the Rietveld structure refinement. Bi2InTaO7 crystallizes in the pyrochlore-type structure, cubic system with space group Fd3m and the lattice parameter a = 10.7612(2) Angstrom. The band gap was estimated to be 2.9 eV. The photocatalytic activity was evaluated by H-2 evolution from the aqueous CH3OH/H2O solution and by O-2 evolution from the aqueous Ce(SO4)(2)/H2O solution. The results indicated that Bi2InTaO7 has potential for splitting water into H-2 and O-2 under ultraviolet light irradiation. Bi2InTaO7 exhibits much larger photocatalytic activity for evolving H-2 from the aqueous CH3OH/H2O solution than the reported Bi2InNbO7 compound.