PROBLEM TO BE SOLVED: To provide a bed apparatus including a concrete mechanism which enables a top plate to move in the direction of a long axis and the direction of a short axis (right and left direction), and to provide a medical image diagnosis apparatus including the bed apparatus.SOLUTION: The bed apparatus includes: the top plate to mount a subject thereon a bed which supports the top plate a driving means which drives moving of the top plate with respect to the bed and a top plate support which mounts and supports the top plate, between the top plate and the bed. The top plate support is supported from the bed, and the top plate includes a mechanism which enables the top plate to move in an optional direction on the opposite face side of the top plate support. The drive means includes: a vertical feeding mechanism which moves the top plate in the direction of the long axis and a horizontally feeding mechanism which moves the top plate in the right and left direction.COPYRIGHT: (C)2011,JPO&INPIT【課題】 天板を長軸方向と共に短軸方向(左右方向)に移動可能にする具体的機構を備えた寝台装置と、この寝台装置を備えた医用画像診断装置を提供する。【解決手段】 被検体を載置する天板と、天板を支持する寝台と、天板の寝台に対する移動を駆動する駆動手段と、天板と寝台との間に該天板を搭載して支持する天板支持部と、を備え、天板支持部は寝台から支持され、天板は天板支持部の対向面側に該天板を任意方向に移動可能にする機構を備え、駆動手段は天板を長軸方向に移動させる縦送り機構と、左右方向に移動させる横送り機構とを備えたことを特徴とする。【選択図】 図2