The present disclosure relates to a pet dry room and a tray used therefor, the pet dry room including: a body having an accommodation space for accommodating a pet therein; a door connected to a front surface of the body and configured to seal or open the accommodation space; and an air circulation module including a motor, a fan, a flow path, a nozzle, and a heater so as to spray and circulate air into the accommodation space, wherein air sprayed from a plurality of spray holes of a combined defecation plate and air spray tray installed on a bottom surface of the accommodation space and nozzles formed on a side surface and a rear surface of the accommodation space is suctioned into a first inlet port positioned on a front side of a ceiling surface of the accommodation space.