NOVELTY - Manufacturing photocatalyst electrode, involves coating composition for photocatalyst layer comprising first photocatalyst particle manufactured by liquid phase process, and second photocatalyst particle manufactured by solid phase technique, on transparent electrode layer of substrate with transparent electrode layer, and bake-processing the substrate with transparent electrode layer (with which the composition for photocatalyst layer is coated), where peak particle size of the first photocatalyst particle is 20-200 nm.    USE - The method is useful for manufacturing photocatalyst electrode which is useful in hydrogen generating apparatus (all claimed).    ADVANTAGE - The photocatalyst electrode manufactured by the method has excellent adhesivity in photocatalyst layer, and is excellent in current collection property.    DETAILED DESCRIPTION - Method for manufacturing photocatalyst electrode, involves coating composition for photocatalyst layer comprising first photocatalyst particle manufactured by liquid phase process, and second photocatalyst particle manufactured by solid phase technique, on transparent electrode layer of substrate with transparent electrode layer, bake-processing the substrate with transparent electrode layer (with which the composition for photocatalyst layer is coated), where peak particle size of the first photocatalyst particle is 20-200 nm, peak particle size of the second photocatalyst particle (400 nm or more) is larger than the peak particle size of the first photocatalyst particle, and the first photocatalyst particle and second photocatalyst particle (become from oxide) contain metal atom chosen from sulfide containing metal atom, oxynitride containing metal atom, and oxysulfide containing metal atom (each independently). INDEPENDENT CLAIMS are included for the following:    (1) photocatalyst electrode having substrate, transparent electrode layer positioned on the substrate, and photocatalyst layer positioned on the transparent electrode layer, where the photocatalyst layer contains photocatalyst particle X and photocatalyst particle Y, peak particle size of the photocatalyst particle X is 20-200 nm, peak particle size of the photocatalyst particle Y (400 nm or more) is larger than the peak particle size of the photocatalyst particle X, and the photocatalyst particle X and photocatalyst particle Y (become from oxide) contain metal atom chosen from sulfide containing metal atom, oxynitride containing metal atom, and oxysulfide containing metal atom (each independently); and    (2) hydrogen generating apparatus, provided with the above-mentioned photocatalyst electrode.