A distance image acquisition apparatus includes a projection unit which projects a first pattern of structured light in a plurality of wavelength bandwidths, an imaging unit which is provided in parallel with and apart from the projection unit by a baseline length, performs imaging with sensitivities to a plurality of wavelength bandwidths, and generates a plurality of captured images corresponding to a plurality of wavelength bandwidths, a determination unit which determines whether or not a second pattern of structured light projected from another distance image acquisition apparatus is included in the captured images, and a pattern extraction unit which extracts the first pattern from a captured image determined as the second pattern being not included by the determination unit, and a distance image acquisition unit which acquires a distance image indicating a distance of a subject within a distance measurement region based on the first pattern.