A visible-light-responsive TiO2-WO3 hollow particle photocatalyst was successfully fabricated by an electrospray method, followed by hydrothermal treatment and calcination at 873 K. The photocatalytic decomposition of acetaldehyde with pristine TiO2 and TiO2-WO3 hollow particles was evaluated under visible light irradiation (lambda > 400 nm). The decomposition of acetaldehyde did not proceed readily with hollow TiO2 particles under visible light irradiation, whereas the hollow TiO2-WO3 particles showed high photocatalytic activity for the decomposition of acetaldehyde.