A separable screw and a juice extractor using the same are disclosed. A separable screw according to an exemplary embodiment of the present invention may include a first module formed with slits by bars on an external circumferential side; and a second module formed with ribs inserted into the slit of the first module; wherein the first module and the second module are detachably coupled, and the rib is inserted into the slit and a gap is formed between the rib and the slit when the second module is inserted into and coupled with the first module.