A control method for a pulse radar apparatus detecting information about a target in a predetermined range, such as relative speed and position of the target, with an update period which is set in advance, the control method comprising: a transmission signal processing step of gating a carrier wave of a predetermined frequency into a pulse-shape in accordance with two or more transmission control signals, and generating a transmission signal when all the two or more transmission control signals are output; a transmission step of radiating the transmission signal as a radio wave to space; a reception step of receiving a reflected wave generated when the radio wave is reflected by the target; a unit sampling processing step of repeating the transmission signal processing step, the transmission step, and the reception step at a plurality of times with a predetermined repetition period, and obtaining distance data by sampling the reception signals for each measurement distance in accordance with a reception control signal; a unit noise processing step of obtaining a noise signal included in each of the distance data; a replica signal generation step of updating a replica signal of the noise signal obtained in the unit noise processing step; and a target information detection step of performing the unit sampling processing step for a first setting number of times while the measurement distance is changed, so as to obtain all the distance data within the range, and detecting the information about the target by subtracting the replica signal from all of the distance data, characterized in that in a first period in the update period, the target information detection step is performed, in a second period other than the first period in the update period, the unit noise processing step is performed a predetermined number of times while an output condition and/or the measurement distance of the transmission control signal used in the transmission signal processing step are changed, and the unit noise processing step is repeatedly performed until all the noise signals for all the distance data are obtained, and further, processing for obtaining all the noise signals for all the distance data is repeatedly performed. a transmission signal processing step of gating a carrier wave of a predetermined frequency into a pulse-shape in accordance with two or more transmission control signals, and generating a transmission signal when all the two or more transmission control signals are output; a transmission step of radiating the transmission signal as a radio wave to space; a reception step of receiving a reflected wave generated when the radio wave is reflected by the target; a unit sampling processing step of repeating the transmission signal processing step, the transmission step, and the reception step at a plurality of times with a predetermined repetition period, and obtaining distance data by sampling the reception signals for each measurement distance in accordance with a reception control signal; a unit noise processing step of obtaining a noise signal included in each of the distance data; a replica signal generation step of updating a replica signal of the noise signal obtained in the unit noise processing step; and a target information detection step of performing the unit sampling processing step for a first setting number of times while the measurement distance is changed, so as to obtain all the distance data within the range, and detecting the information about the target by subtracting the replica signal from all of the distance data,