A work treating apparatus includes an injection unit for injecting pressurized steam jets evenly to a work without dropping a temperature of pressurized steam jets. The apparatus includes a conveyor for conveying the work in a machine direction and an injection unit for injecting superheated and pressurized steam jets to the work. The injection unit has a lower surface including a plurality of injection orifices in a cross direction. The conveyor is flexible and includes a first mesh belt facing to an upper surface side of the work and a second mesh belt facing to a lower surface side of the work. The first and second mesh belts sandwich the work therebetweeen to convey the work in the machine direction. The lower surface comes in slidable contact with the first mesh belt to curve at least the first mesh belt of the first and second mesh belts downward.
