Provided is an air-conditioning device that, by means of causing the shape of a flow path to be suitable, increases the efficiency of the discharge of charged particles. The cylindrical air-conditioning device is, at a position separate from the central axis, provided with a flow path through which air flows in the lengthwise direction, and in the flow path is disposed a charged particle generating unit having a first generating unit and a second generating unit that generate positive and negative charged particles. Of the cross section and outflow opening (11) of the flow path, the length in the direction perpendicular to the direction of alignment of the first generating unit and the second generating unit is longer at the center-side portion than the end-side portion in the direction of alignment. As a result, compared to conventional air-conditioning devices that throttle the flow of air by narrowing the cross section of the flow path and the outflow opening, the shape of the flow path and the outflow opening (11) has a reduced length of the edge with respect to the area of the outflow opening (11) and the inner surface area with respect to the volume of the flow path, reducing the proportion of charged particles that collide with the edge of the outflow opening (11) or the inner surface of the flow path, and increasing the proportion of outflow of charged particles.La présente invention se rapporte à un dispositif de conditionnement dair qui, en rendant la forme dune voie de circulation appropriée, augmente lefficacité de la décharge de particules chargées. Le dispositif de conditionnement dair cylindrique est, dans une position séparée de laxe central, pourvu dune voie de circulation dans laquelle circule lair dans le sens de la longueur, et dans la voie de circulation est disposée une unité de production de particules chargées possédant une première unité de production et une seconde unité de production qui produisent des particules chargées positives et néga
