A fixing device includes a first rotatable body, a second rotatable body, a frame, and a shutter. The frame supports the first rotatable body and the second rotatable body. The first rotatable body and the second rotatable body provide a nipping region therebetween where a sheet is configured to be conveyed in a conveying direction. The sheet is configured to pass through an opening of the frame to be conveyed toward the nipping region. The shutter is pivotally movable about a first axis between a closed position where the shutter closes the opening and an open position where the shutter opens the opening. The first axis is positioned downstream of the nipping region in the conveying direction.