The present invention provides a work hood that allows for free rotation in a work box to provide a wide work area and easy decontamination of a sealing portion present at the boundary between the work hood and the work box.
A rotation support for rotatably supporting the entire half suit is provided. The rotation support includes a base portion, a rotating portion, a bearing portion, a sealing member, and a communication hole. The base portion is airtightly and annularly provided around an opening, and the rotating portion is provided around the base portion through the bearing portion, with a hem portion of the half suit being fixed to the rotating portion. The sealing member is annularly provided in an annular space formed by the base portion and the rotating portion so as to separate the work box and the external environment. The communication hole is provided so as to lead to the external environmental side from the annular small space side formed by the sealing member together with the base portion, the rotating portion, and the bearing portion, and is connected to a supply means for supplying a decontamination gas and the like to the inside of the small space and to a suction means for sucking clean air and the like from the inside of the small space.