A distance measuring device using a TOF (Time of Flight) scheme includes a controller, a light receiver, and a calculator. The controller generates a first exposure signal, a second exposure signal, a third exposure signal, and one particular exposure signal selected from the first, the second, and the third exposure signals. The light receiver performs a first exposing process, a second exposing process, a third exposing process, and a particular exposing process corresponding to the particular exposure signal out of the first, the second, and the third exposing processes. The calculator determines, based on a difference between an exposure amount obtained from the particular exposing process and an exposure amount obtained from an exposing process according to one of the first, second, and the third exposure signals corresponding to the particular exposure signal, whether or not the light emitted from the distance measuring device interferes with light emitted from other distance measuring device.