An installation assistance apparatus (100) includes a first image capture unit and a second image capture unit that are placed in such a way as to face each other in a plan view, an acquisition unit (102) acquiring a first image from the first image capture unit, a detection unit (104) detecting a position of at least part of the second image capture unit in the first image by processing the first image, a determination unit (106) determining whether the position of the second image capture unit satisfies a criterion, and an output processing unit (108) causing a determination result by the determination unit (106) to be output.