The transmitting part of a short-pulse radar, which includes a first pulse generating part, a second pulse generating part, an oscillator and a switch, radiates, into a space, predetermined short-pulse waves that causes no interferences with an RR radio wave emission inhibiting band and an SDR band, while complying with a specified spectrum mask as a UWB short-pulse radar. The first pulse generating part outputs, in a predetermined period, a first pulse having a longer width than the short-pulse waves. The second pulse generating part outputs a second pulse having a width corresponding to thewidth of the short-pulse waves while the first pulse generating part is outputting the first pulse. The oscillator oscillates only while the first pulse generating part is outputting the first pulse.The switch is in an ON-state to pass the output signal from the oscillator only while the second pulse generating part is outputting the second pulse. In this way, the output signal from the switch is radiated into the space as the predetermined short-pulse waves.