An apparatus for analyzing a golf swing according to an exemplary embodiment of the present invention includes: a signal detecting unit including a Doppler radar sensor which radiates a transmission wave to a golf club and a golf ball and detects a reflected wave, in which a first reflected wave of the golf club and a second reflected wave of the golf ball are mixed, and detects a frequency deviation between the transmission wave and the mixed reflected wave and generates an output signal; and a swing analysis information calculating unit configured to calculate a speed of the golf club and a speed of the golf ball by using the output signal.