Abstract: A cart device (1) includes a first base portion (3a) which can travel on a floor surface, a support body (3b) which extends upward from the first base portion (3a), article placing members (2, 10) on which an article can be placed, and support means (4, 11) for disposing the article placing members (2, 10) on at least three sides around the support body (3b) such that a vertical position of each of the article placing members (2, 10) can be changed.

Abstract: In a tray (2) of the present invention, an orientation of the tray (2) with respect to a cart body (3) is changed and the tray (2) is detachably attached to the cart body (3), and an aspect of an article accommodation region of the tray (2) when a front side of the tray (2) faces the support base (3b) side and the tray (2) is mounted on a tray support mechanism (4) and an aspect of an article accommodation region when a rear side of the tray (2) faces the support base (3b) side and the tray (2) is mounted on a tray support mechanism (4) are different from each other.