An apparatus for estimating a Direction of Arrival (DOA) of a wideband includes a first signal receiving unit and a second signal receiving unit to receive a wideband signal while satisfying d≦Mc/2fs, wherein ‘d’ denotes a distance the first signal receiving unit and the second signal receiving unit are spaced apart from each other, ‘c’ denotes the speed of sound, ‘M’ denotes a number of wideband frequencies being a number of fast Fourier transformation (FFT) points of a wideband signal, and ‘fs’ denotes a sampling frequency, and a DOA calculating unit to calculate a DOA (θ) using a normalized frequency ( f) which is obtained by performing an FFT on the respective wideband signals transmitted from the first signal receiving unit and the second signal receiving unit, and using the distance d.