An in-vehicle pulse radar (100, 200), comprising at least two printed circuit boards (101a, 102a) of a first printed circuit board for high frequency and a second printed circuit board for low frequency, and a predetermined signal transmitting means connecting the two printed circuit boards; wherein the first printed circuit board has: a local oscillator that outputs a local oscillation signal; a transmitting section configured to output a transmission signal by modulating the local oscillation signal inputted from the local oscillator; an antenna configured to input the transmission signal from the transmitting section to emit to the air as radio wave and to receive reflected waves of the radio wave reflected by an object; and a receiving section having a time division section that performs time division on the receiving signal received from the antenna in synchronism with a measured distance, a frequency converter that converts frequency of the receiving signal into the baseband signal, and a delay circuit (153, 201) that outputs the baseband signal by applying a predetermined delay time to the baseband signal; and the second printed circuit board has a signal processing section including an object information calculating section that inputs the baseband signal from the receiving section via the signal transmitting means to calculate information on the object, and a control signal generating section that outputs a control signal for driving the time division section to the time division section via the signal transmitting means; and the delay circuit (153, 201) applies the delay time to the baseband signal so that the baseband signal inputted from the frequency converter passes through the signal transmitting means by being delayed by a predetermined time from the control signal; characterized in that the delay time is adjusted to make a time lag so that a time slot in which the control signal passes through the signal transmitting means does not substantially overlap with a time slot in which the baseband signal passes through the signal transmitting means. a local oscillator that outputs a local oscillation signal; a transmitting section configured to output a transmission signal by modulating the local oscillation signal inputted from the local oscillator; an antenna configured to input the transmission signal from the transmitting section to emit to the air as radio wave and to receive reflected waves of the radio wave reflected by an object; and a receiving section having a time division section that performs time division on the receiving signal received from the antenna in synchronism with a measured distance, a frequency converter that converts frequency of the receiving signal into the baseband signal, and a delay circuit (153, 201) that outputs the baseband signal by applying a predetermined delay time to the baseband signal; and the second printed circuit board has a signal processing section including an object information calculating section that inputs the baseband signal from the receiving section via the signal transmitting means to calculate information on the object, and a control signal generating section that outputs a control signal for driving the time division section to the time division section via the signal transmitting means; and the delay circuit (153, 201) applies the delay time to the baseband signal so that the baseband signal inputted from the frequency converter passes through the signal transmitting means by being delayed by a predetermined time from the control signal;