A folding pet carrier includes a back panel, a bottom panel, a front panel, a top surface portion, and two side panels. A lever device disposed at an inner side surface of the back panel includes a telescopic rod body and a handle portion disposed at an upper end of the telescopic rod body. The lever device extends to the outer side of the top surface portion or is hidden under the top surface portion. Rollers are disposed on a bottom surface of the bottom panel. Two straps are disposed on two sides of the back panel. A connecting member is disposed between side edges of the side panels, the bottom panel, the front panel, and the top surface portion. The folding pet carrier can be stowed by folding the two side panels, the top surface portion and the front panel to be stacked on the back panel.
