A hinge apparatus for a folder-type portable communication device, wherein a body portion and a folder portion can be coupled or separated by applying a force to a hinge cap or moving a hinge dummy laterally. The device includes a body portion and a folder portion coupled to the body portion to pivot around a hinge axis, and a center hinge arm provided in the body portion. First and second side hinge arms are provided in the folder portion, and a hinge cap is provided in the first side hinge is pushed with an external force. A hinge shaft is coupled with or separated from the first side hinge arm by retracting or protruding via pushing the hinge cap, and a hinge dummy provided in the center hinge arm is coupled with or separated from the second side hinge arm by moving laterally along the hinge axis.