To provide a sheet cooling device in which sheets are sufficiently cooled even when the sheets are consecutively fed, and stable cooling effect is exhibited.

The sheet cooling device includes a conveyance passage along which a sheet is guided downstream of a heat fixing device. The conveyance passage is formed from a member that has opposite faces. The member is composed of a heat insulation material or covered with the heat insulation material. The sheet cooling device has openings perpendicular to the direction of the sheet conveyance so as to continue from the conveyance passage formed from the opposite faces.