Disclosed is a receptacle 30 for use with a medical suction device 1 which is equipped with a cover body 15 and an external case 20 for detachably holding and air-tightly surrounding the receptacle 30 and a patient-side tube for introducing waste liquid into the receptacle 30, and designed to create a negative pressure in both an interior space of the cover body 15 and the external case 20 and an interior space of the receptacle 30 so as to allow waste liquid to be sucked into the receptacle 30 through the patient-side tube. The receptacle 30 comprises an air-pervious/liquid-impervious element having air perviousness and liquid imperviousness. The air-pervious/ liquid-impervious element at least partly constitutes a portion of the receptacle 30 to be surrounded by the cover body 15 and the external case 20.
