To provide a trouser press capable of neatly creasing trousers by pressing them entirely along the thickness for long hours not requiring energy for keeping heat or a pressure, functioning as a cabinet and easy to handle.

The trouser press is provided with a square bag body 2 consisting of an impermeable and soft plastic film and a check valve 10 provided on the surface of the bag body 2 and for sucking air inside the bag 2 through a suction hose of a vacuum cleaner. The bag body 2 is tightly sealed through welds or bonds of three sides 2a, 2b and 2c and provided with an openable/closeable zipper 7 having a sealing function at an opening 2d of one side. After the air inside the bag 2 is sucked, the check valve 10 keeps the inside of the bag body 2 in a negative pressure state for long hours to join the film along the surface of the trousers 50.

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