A music genre judging device able to judge a genre of music in a relatively simple structure. The music genre judging device is provided with a signal input part 4 which takes in music reproduction signal outputted from a music reproduction device 100; a signal processing part 10 which outputs an integration value and a differential value of a low frequency component and a differential value of a high frequency component of the music reproduction signal taken in by the signal input part 4; a data generating part 30 which takes in the integration value and the differential values outputted from the signal processing part 10 for each prescribed sampling unit time Tn, judges whether the integration value and the differential value of the low frequency component and the differential value of the high frequency component exceed respective prescribed levels within the sampling unit time Tn, and generates analysis data D1 obtained by totalizing numbers of times of judgment when a value exceeding the prescribed level is detected for each prescribed sampling cycle Tm and each of the integration value and the differential values; and a data analysis part 31 which calculates respective average values M0 to M2 of the totalized values and respective coefficients of variation CV1, CV2 of the totalized values, which are described with respect to the respective differential values of the low frequency component and the high frequency component in the analysis data D1, and judges a genre of music outputted from the music reproduction device based on the calculation result.
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