To reduce the size of a sealing device that bundles sheets of paper, such as pieces of paper money, while improving a work efficiency for an operator.

A paper money pressing section 2 sandwiching a paper money bundle P thrown in a throwing position is moved to a sealing position where a paper band catch plate 29 presses a paper band L against the paper money bundle P. The paper money pressing section 2 sandwiching the paper money bundle P is then rotated in a sealing position, and the paper band L is wrapped around the thrown paper money bundle P to be bound.