The present invention relates to a desiccant dehumidifier, having a plurality of the suction flow path and the at least one discharge passage connected to the suction passage thereof and cabinets; It is provided on each suction passage inside the cabinet and a plurality of the dehumidifying rotor to the dehumidifying action; The inhalation flow path or seuppaen taken to be the discharge is provided on a flow path out through the discharge flow path for inhaled and then the dehumidified air through the respective intake passage and the indoor air; Wherein the passing through each dehumidification rotor comprises a plurality of rotor drying means for drying the dehumidification rotor, to suck the room air to the plurality of suction flow path, so the dehumidification of a plurality of the dehumidification rotor is advantageous in that improves the dehumidification performance, dehumidification without compromising the performance benefits that can be produced even in a smaller overall size. Desiccant dehumidifier, the dehumidifying rotor, desiccant, double suction fan, the size, volume