PROBLEM TO BE SOLVED: To suppress to a high degree, weather clutter or the like having large velocity dispersion, and to acquire a target velocity to a radar from Doppler data acquired from each receiving signal. SOLUTION: A radar device includes: a signal generation unit for generating a radar signal in which two or more unit signals to which the same modulation is applied are arrayed repeatedly in one pulse which is a transmission unit; a pulse compression unit for compressing a component of the unit signal included in a receiving signal by using as a reference signal, the unit signal to which the same modulation is applied, forming the radar signal; a pulse inside clutter suppression unit for suppressing a clutter component in one pulse; a remaining signal suppression unit for suppressing a signal component remaining in the receiving signal; a unit signal string integration unit for picking up the unit signal of the receiving signal at each distance reflected by a detection target, and acquiring a unit signal string integration value by integrating the receiving signal with respect to each Doppler frequency by Fourier transform processing; an inter-pulse signal integration unit for integrating the unit signal string integration value; and a target signal extraction unit for extracting a larger signal than a threshold as a target signal, relative to the integration value. COPYRIGHT: (C)2011,JPO&INPIT