The present invention relates to a pillow sterilizer, and more particularly, in the construction of a pillow sterilizer for accommodating a pillow by sterilizing the inside of the sterilization cover, the first sterilization cover and the second sterilization made of an elastic material to closely accommodate the pillow therein. An air circulation tube connected to the cover, the first sterilization cover and the second sterilization cover to be a connection passage of air circulated into the first and second sterilization covers, and provided on the air circulation tube to circulate air And a sterilant supply unit connected to the air circulation tube and supplying a sterilizer to air circulated through the air circulation tube, wherein the outer circumferential surface of the pillow to be sterilized contains the first sterilization cover. And a sterilizer configured to be adhered to the inner circumferential surface of the second sterilization cover to be supplied and circulated through the sterilizer. The present invention relates to a pillow sterilizer capable of increasing sterilization effect by supplying air evenly into the pillow surface as well as the pillow surface. To this end, the present invention, in the pillow sterilizer for sterilizing the pillow, an opening for accommodating the pillow is formed on one side, the air circulation port is formed on the other side is formed in the form of a bag, provided as a pair of opening side A first sterilization cover and a second sterilization cover which are tightly coupled to overlap each other to seal the pillow therein； An air circulation tube interconnected to air circulation ports formed in the first sterilization cover and the second sterilization cover to form a passage through which air is circulated； An air circulation pump provided on the air circulation tube to circulate air through the air circulation tube and the accommodation space in the first and second sterilization covers； And a sterilizer supp
