A fixing device includes a first feeder provided downstream of a fixing portion heating a toner image formed on a first side of a sheet in a feeding direction, a second feeder provided adjacent downstream of the first feeder, and a guide contacting with a second side of the sheet fed by the first feeder and guiding toward the second feeder, a blower, a first duct guiding the air at a first position between the first and feeders, and a second duct at a second position between the first position and the first feeder. The first and second feeders are contactable to the sheet over an entire width. The air from the blower passes through the first duct, is sent to a feeding passage formed between the first and second feeders from the first position, and sent to the second side, then, the air passes through the second duct from the feeding passage via the second position and is exhausted.