Patent ID: 7322690

Claim:
A medium transportation apparatus comprising: a sucking unit including a medium transportation surface on which a plurality of sucking holes are formed, a decompression chamber communicating with the sucking holes and a sucking device for sucking air in the decompression chamber; a delivering device for supplying a medium onto the medium transportation surface of the sucking unit; wherein, the medium supplied onto the medium transportation surface is sucked through the sucking hole by the sucking device, and delivered from an upstream side of the sucking unit to a downstream side thereof, wherein each of the sucking holes of the sucking unit is formed by a through hole section communicating with the decompression chamber and a sucking chamber having a larger area of a sucking surface opposed to the medium than a sectional area of the through hole section, and wherein side edges of said sucking chamber surrounding an entire periphery thereof are provided with flared slant faces.