A portable communication device includes a body including at least one part attaching/detaching section, a case slidably coupled to the body to open or close the part attaching/detaching section as the case slides, a sliding module installed between the body and the case to slide the case and a locking unit installed in the body and the case. The case is slid to open or close the entire part attaching/detaching section. The part attaching/detaching section may embody any of a battery attaching/detaching section, a memory card attaching/detaching section and a plurality of connecting jacks, without limitation.