The present invention relates to an air freshener fixing device for a spittoon of a dental unit chair. More specifically, equipment required for dental treatment is comprehensively prepared in a unit chair to be used for several sorts of dental treating techniques. When a patient spits liquid foreign materials such as saliva gathered in the mouth and solid foreign materials such as tartar through a spittoon after or during treatment, the generation of bad smells caused by foreign materials remaining on the drainage of the spittoon can be prevented. An air freshener is prepared at the top of a filtering sieve hung on the internal surface of the drainage of the spittoon so that the air freshener can be attached to and detached from the top of the drainage. The outer circumference thereof is divided into an aromatic container formed as a through-hole connected with the inside and an aromatic cover, so that an attachable and detachable aromatic hole is prepared. The air freshener is prepared in the aromatic container. The aromatic hole is formed on the bottom surface of a semi-spherical plate, and an accommodating unit for accommodating the aromatic hole is prepared. The outer circumference of the aromatic hole is inserted therein to be able to be attached to and detached from the semi-spherical plate. Liquids such as saliva and blood discharged through the drainage of the spittoon are discharged through the filtering sieve and drainage, and solid foreign materials are filtered by the filtering sieve. At the same time, bad smells that back up through the drainage pipe of the drainage can be removed by the air freshener in the aromatic hole. Also, the air freshener prepared in the aromatic hole can be replaced and charged, so that bad smells can be permanently removed.본 발명은 치과 유닛체어의 타구대용 방향제 고정장치에 관한 것으로, 좀더 상세히는 치과의 진료행위에 필요한 장비를 종합적으로 갖추어 각종 치과치료 및 처치에 사용되는 유닛체어에 마련되어 환자가 진료를 다 받은 후나 진료 중에 입에 고인 타액 등의 액체 이물질과 치석 등의 고체 이물질을 뱉을 수 있도록 하는 타구대의 배수구 배관에 잔존하는 이물질로 인해 악취가 발생되는
