A forced air cooling device (2) is provided with a fan (3), a dust filter (4), and an intake portion (5). The fan (3) is attached inside a housing (1) in which an electric device is housed, and suctions air into the housing (1). The dust filter (4) is installed upstream of the fan (3). The intake portion (5) forms an intake path (6) upstream of the dust filter (4). The intake path (6) is formed of a connection of a first wind path portion (10) having an upper entrance and a lower exit, and a second wind path portion (11) having a lower entrance and an upper exit.