A pressurization passage that divides a constant pressure from a pressure source with passage resistances so as to have a predetermined constant pressure is disposed on a downstream side of a sample loop in order to maintain a back pressure of the sample loop constant when a sample gas is collected to the sample loop. The etch-stop layer is formed over an underlying stud so as to serve as an alignment target during formation of an overlying stud formed in an upper layer. In the opened position, the primary jointing frame and the secondary jointing frame are pivotally moved and extended to open pivotally move the container cover away from the container body to form a wide opening angle with respect to horizontal.