To solve a problem that a folding cart is very convenient for carrying cargoes; however, during the work in a narrow space, it forms an obstacle even when it is folded or worsens the working efficiency; thus, the cart has to be brought close to a wall in a leaning position; however, if a floor is slippery or a foot hits the cart, the cart is immediately toppled in a very dangerous manner.

A folding cart is simply folded, but not self-standing. Thus, it has to be leaned against a wall when it stands. The self-standing cart can stand up by itself like a stepladder, thereby it can be placed more safely than it is leaned against the wall.