Abstract: A combination bag includes at least two pieces of face material and at least four zippers. The two pieces of face material are of the same shape and have a zipper on each of their peripheral sides. By operating the slider of each zipper, all the zippers can be closed to join the two pieces of face material together, forming a combination bag with a hollow interior for receiving objects. By opening one of the zippers, the combination bag is provided with an opening through which objects can be put into or taken out of the combination bag. A plurality of such zipper-enclosed pieces of face material can make combination bags featuring not only easy disassembly but also different internal receiving spaces and different shapes.