The invention provides a portable air conditioner which comprises an inner module and a shell assembly. The inner module comprises a chassis and a heat exchange system; the heat exchange system is arranged on the chassis and comprises a compressor, a first heat exchanger, a second heat exchanger and a first fan; the first fan is used for driving an air flow to exchange heat with the first heat exchanger; the shell assembly comprises a shell and a second fan; the shell is provided with an air outlet; the second fan is located in the shell, is connected with the shell and communicates with the air outlet; the inner module is held in the shell; and the second fan corresponds to the second heat exchanger and is used for driving the air flow to exchange heat with the second heat exchanger. According to the portable air conditioner provided by the invention, the product is simple to assemble, a bottleneck process can be prevented, the assembling time consumption of the portable air conditioner is shortened, and when the structure is disassembled, the portable air conditioner is basically disassembled into the shell assembly and the inner module so as to be high-efficiency in disassembling and convenient to overhaul.