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A substrate accommodation device can effectively prevent a foreign substance from adhering to a substrate accommodated therein depending on an environment where the substrate accommodation device is used. The substrate accommodation device 100 includes an air supply unit 110 configured to introduce exterior air into the substrate accommodation device 100; an exhaust unit 120 disposed to face the air supply unit 110; a substrate mounting plate 140 provided between the air supply unit 110 and the exhaust unit 120 and provided with holes 142 through which the air supply unit 110 and the exhaust unit 120 communicate with each other; an air supply filter 112 provided at the air supply unit 110; and a fan 122 provided at the air supply unit 110 or the exhaust unit 120. Further, one of a state sensor configured to detect a state within the substrate accommodation device 100, a particle charging device, and a temperature controller or a combination of two or more thereof is detachably provided in a mounting hole 150. (FIG. 2)