An ultrasonic wave detection apparatus includes a transmission unit which transmits ultrasonic waves at a first frequency and a second frequency, a reception unit which receives ultrasonic waves transmitted from the transmission unit, and a control unit which causes the transmission unit to transmit ultrasonic waves at the first frequency and causes the reception unit to receive the first frequency ultrasonic waves to obtain a detection timing of a peak value of a n-th wave of the received first frequency ultrasonic waves, causes the transmission unit to transmit ultrasonic waves at the second frequency and causes the reception unit to receive the second frequency ultrasonic waves to obtain a detection timing of a peak value of a n-th wave of the received second frequency ultrasonic waves, and specifies “n” of the n-th wave from which the peak value is detected based on a difference in the detection timings.