INTAKE AIR FILTERING DEVICE

PROBLEM TO BE SOLVED: To provide an intake air filtering device that provides an effective sealing to nose tissues therearound, and holds a filtering medium that is fixed so as not to be unintentionally removed, without excessively reducing the comfort for a user.SOLUTION: The air filtering device for nose includes: a pair of filters with flat or irregular surfaces; a support structure including a pair of substantially-ring-shaped bases or sleeves 330 and 332 to support the filters; and a bridge 334 connecting the bases or sleeves 330 and 332 together in such a manner as to hold them with a desired interval and a desired angular relationship therebetween. The support structure can be inserted into nasal cavities such that the filters are disposed inside the corresponding nasal cavities. A flexible rim retains the support structure and the filters with gaps from the surrounding walls of the nasal cavities. The filters each can be disposed inside the base at a certain angle relative to the wall of the base.