The air cleaner (A) is provided with: a portable frame (1) in which an air passage (R) having a suction port (11) and an outlet (42) is formed a blowing means (44) which is provided inside the frame (1) and is for blowing out room air, which has been introduced into the air passage (R) from the suction port (11), from the outlet (42) a de-odorizing element (62), which is disposed so as to obstruct the air passage (R) and through which the air introduced into the air passage (R) passes and a control means (47) for controlling the operation of the blowing means (44). The de-odorizing element (62) comprises a catalyst that adsorbs the ammonia component in the air introduced into the air passage (R) and scavenges the ammonia component from the air. The control means (47) controls the blowing means (44) so that the flow rate of the air passing through the de-odorizing element (62) is at or below a prescribed value. The air cleaner is configured so that the de-odorizing element scavenges at least approximately 70% or more of the ammonia component in the room air introduced into the air passage (R).La présente invention concerne un filtre à air (A) pourvu des éléments suivants : un cadre portatif (1), dans lequel un conduit dair (R) doté dun orifice daspiration (11) et dun orifice de sortie (42) est formé un moyen de soufflage (44) prévu à lintérieur du cadre (1) et destiné à évacuer, par lorifice de sortie (42), lair ambiant introduit dans le conduit dair (R) depuis lorifice daspiration (11) un élément désodorisant (62), placé de manière à obstruer le conduit dair (R) et à travers lequel passe lair introduit dans le conduit dair (R) et un moyen de commande (47) destiné à commander le fonctionnement du moyen de soufflage (44). Ledit élément désodorisant (62) comprend un catalyseur, qui adsorbe le composant ammoniac présent dans lair introduit dans le conduit dair (R) et extrait ledit composant ammoniac de lair. Le moyen de commande (47) commande le moyen de soufflage (4
