The present invention relates to a dual-body drug administration device which administers drugs and removes mucus from the paranasal sinus through the nostrils in order to prevent or treat a paranasal sinus disease and, more specifically, to a device in which two injectors having adapters coupled thereto are integrally fixed by a fixing holder, the adapters of the fixed injectors are simultaneously brought into contact with both the nostrils, and then negative pressure is generated in the nasal cavity to pull out mucus from the paranasal sinus or administer a drug to the paranasal sinus.
