Abstract: A label having a vent filter function and a ventilation housing having a reduced cost are provided. The label comprises an ink-receiving layer and a pressure-sensitive adhesive layer for applying the ink-receiving layer to an adherend, wherein the ink-receiving layer is an air-permeable porous material comprising at least one resin selected from PTFE and polyolefins and the label has, formed in the pressure-sensitive adhesive layer, an air passage hole which extends from one to the other side of the pressure-sensitive adhesive layer in the thickness direction and enables a gas which has permeated the ink-receiving layer to pass therethrough. The label may further include an air-permeable support layer and an air-impermeable reinforcing layer disposed between the ink-receiving layer and the pressure-sensitive adhesive layer.

Abstract: A ventilation member having: a breathable film transmitting gas passing through an opening portion of a housing in a state in which the breathable film is fixed to the opening portion; and a support including a supporting portion for supporting the breathable film and an insertion portion to be inserted into the opening portion of the housing; wherein the insertion portion has a lock portion in an insertion-start-side end portion thereof, the lock portion having a tapered forward end, while the insertion portion is divided into a plurality of parts circumferentially at least on an insertion start side thereof.