Patent ID: 8720693

Claim:
A semiconductor wafer storing container comprising: a container main body including a cavity for storing a plurality of semiconductor wafers in a parallel manner and, an opening for transferring one or more semiconductor wafers into or from the cavity, the opening lying in a plane orthogonal to a face of each semiconductor wafer stored in the cavity; a covering body configured to be mounted detachably from outside to the opening in order to close the opening; and a gasket that, when the opening is closed by the covering body, seals between an edge portion of the covering body and an edge portion of the opening by being sandwiched between the covering body and the container main body and elastically deforming, wherein the gasket is configured such that, when the opening is closed by the covering body and the edge portion of the covering body and the edge portion of the opening are sealed by the gasket, a size of a deformation margin of the gasket is formed to be smaller in a region that seals a vertical edge portion of the opening orthogonal to the face of each semiconductor wafer than in a region that seals a horizontal edge portion of the opening parallel to the face of each semiconductor wafer, whereby, when the covering body is moved in a direction away from the container main body to cause the opening to open, air flows between the inside and the outside of the cavity at the vertical edge portion before air flows between the inside and the outside of the cavity at the horizontal edge portion.