A humidifying unit includes an adsorption member (41a); a heater (42) that heats a moisture release area (A2) of the adsorption member (41a); fans (43, 44) that generate an air flow; a housing (47) that accommodates the foregoing; an electric component (46) including a heat generating component; and a cooler (84) that air-cools the heat generating component, and the housing (47) has a humidifying air path (P1, P2) through which air taken from outside the housing (47) by the fans (43, 44) is discharged outside the housing (47) via the adsorption member (41a), and a cooling air path (P4) in which the cooler (84) is disposed, and air taken from outside the housing (47) by the fans (43, 44) is joined with the humidifying air path (P1, P2), and a route of air passing through the humidifying air path (P1, P2) from the cooling air path (P4) and being discharged outside the housing (47) is a route that does not pass through the moisture adsorption area (A1) of the adsorption member (41a).