A distance measurement apparatus executes transmitting and receiving a signal with another device; acquiring first and second phases when the other device receives signals of first and second frequencies from the distance measurement apparatus; measuring third and fourth phases when the signals of first and second frequencies are received from the other device; measuring a distance to the other device based on the acquired first and second phases, the first and second frequencies, and the measured third and fourth phases; and setting randomly a transmission order, and the first and second frequencies. The transmission order indicates an order of transmitting the signal of the first frequency by the other device, transmitting the signal of the first frequency by the distance measurement apparatus, transmitting the signal of the second frequency by the other device, and transmitting the signal of the second frequency by the distance measurement apparatus.