Abstract: The present invention is to provide a detachable electronic device comprising a first housing and a second housing releasbly secured together. Within the first housing there is provided a first circuit board including a first connection member provided at one end of the first circuit board and extended beyond one end of the first housing to connect to an electronic apparatus for communicating current and signal between the first circuit board and the electronic apparatus, and a second connection member provided at the other end of the first circuit board and extended adjacent to the other end of the first housing. Within the second housing there is provided a second circuit board including a third connection member provided at its one end and extended beyond one end of the second housing to connect to the second connection member. Thus, the first and the second housings are assembled together, enabling the first and the second circuit boards to communicate current and signal therebetween.