A noise extracting device, comprising: first and second microphones (11, 12) that are provided at spatially different positions and pick up sounds; a first directionality combiner adapted to generate a first directionality signal by subjecting output signals (um1, um2) of the first and second microphones (11, 12) to a first directionality combining; a first noise signal extractor that extracts a first noise signal from the first directionality signal; a second directionality combiner adapted to generate a second directionality signal by subjecting output signals (um1, um2) of the first and second microphones (11, 12) to a second directionality combining, the second directionality combining being different from the first directionality combining; characterized by a second noise signal extractor that extracts a second noise signal from the second directionality signal; and a noise signal separator that separates the first noise signal and the second noise signal into individual noise signals (un1, un2) indicating noises generated in the respective first and second microphones (11, 12), wherein the noise signal separator obtains the individual noise signals (un1, un2) by transforming the first noise signal and the second noise signal in accordance with a first relational expression between the first and second noise signals (xn1, xn2) and the individual noise signals (un1, un2), the first relational expression representing the inverse of a relational expression indicating a relationship between the first and second directionality signals (xm1, xm2) and the output signals (um1, um2) of the first and second microphones (11, 12). first and second microphones (11, 12) that are provided at spatially different positions and pick up sounds; a first directionality combiner adapted to generate a first directionality signal by subjecting output signals (um1, um2) of the first and second microphones (11, 12) to a first directionality combining; a first noise signal extractor that extracts a first noise signal from the first directionality signal; a second directionality combiner adapted to generate a second directionality signal by subjecting output signals (um1, um2) of the first and second microphones (11, 12) to a second directionality combining, the second directionality combining being different from the first directionality combining; characterized by a second noise signal extractor that extracts a second noise signal from the second directionality signal; and a noise signal separator that separates the first noise signal and the second noise signal into individual noise signals (un1, un2) indicating noises generated in the respective first and second microphones (11, 12), wherein the noise signal separator obtains the individual noise signals (un1, un2) by transforming the first noise signal and the second noise signal in accordance with a first relational expression between the first and second noise signals (xn1, xn2) and the individual noise signals (un1, un2), the first relational expression representing the inverse of a relational expression indicating a relationship between the first and second directionality signals (xm1, xm2) and the output signals (um1, um2) of the first and second microphones (11, 12).