Electronic device including waterproof structure

A portable communication device comprising:

• a housing including a first housing and a second housing, the first housing including a first inner conductive plate having an opening formed therein, and the second housing including a second inner conductive plate;
• a hinge connected between the first housing and the second housing such that each of the first and second housings is rotatable with respect to the hinge to allow the portable communication device to transition between a folded state and an unfolded state;
• a flexible display disposed over the first inner conductive plate and the second inner conductive plate;
• a first printed circuit board (PCB) disposed in the first housing;
• a second PCB disposed in the second housing;
• a flexible PCB (FPCB) partially overlapped with the hinge such that a first ending portion and a second ending portion of the flexible PCB are connected to the first PCB and the second PCB, respectively, and such that a portion of the flexible PCB between the first and second ending portions passes through the opening;
• and
• an elastic member in contact with the flexible PCB and covering at least one portion of the opening.