The present invention relates to a seat surface transport device (1) including an upper part (3) for accommodating a transport object such as a seat surface of an operating table and a lower part (2). The lower part (2) includes at least three double casters (6) for manually moving the seat surface transport device (1) in an arbitrary direction, at least one electric drive roller (8), and at least one electric drive roller ( A lowering mechanism (10) that selectively lowers and raises 8) with respect to the double caster (6), and the electrically driven roller (8) has an upper position for manually moving the seat surface transport device (1)； The lower position where the seat surface transport device (1) is moved electrically is taken. The lowering mechanism (10) includes a pedal (9) operable in the operation direction, and the lowering mechanism (10) is configured such that the first operation of the pedal (9) in the operation direction causes at least one electric drive roller (8) to operate. It is designed such that the second operation of the pedal (9) in the operating direction raises at least one electrically driven roller (8) from the lower position to the upper position while lowering from the upper position to the lower position. [Selection] Figure 2本発明は、例えば、手術台の座面等の運搬対象物を収容する上部（３）と、下部（２）と、を含む座面運搬装置（１）に関する。下部（２）は、座面運搬装置（１）を任意の方向に手動で移動させる少なくとも３つのダブルキャスタ（６）と、少なくとも１つの電動駆動ローラ（８）と、少なくとも１つの電動駆動ローラ（８）をダブルキャスタ（６）に対し選択的に下降及び上昇させる下降機構（１０）と、を含み、電動駆動ローラ（８）は、座面運搬装置（１）を手動で移動させる上部位置と、座面運搬装置（１）を電動で移動させる下部位置と、を採る。下降機構（１０）は、操作方向に操作可能なペダル（９）を含み、下降機構（１０）は、操作方向のペダル（９）の第１の操作が少なくとも１つの電動駆動ローラ（８）を上部位置から下部位置に下降させると共に、操作方向のペダル（９）の第２の操作が少なくとも１つの電動駆動ローラ（８）を下部位置から上部位置に上昇させる様に設計される。【選択図】図２
