A noise control device reduces a noise coming to a plurality of spaces acoustically independent from one another. The noise control device includes: sound output means for outputting a sound into the corresponding space; noise detection means arranged in at least one of the spaces for detecting a noise coming into the space; and signal generation means for generating a cancel signal for cancelingthe noise according to the noise detected in one of the noise detection means and outputting the generated cancel signal to the plurality of sound output means.