A wearable display device that employs a sliding structure is disclosed. The device includes: a frame; a main unit coupled to the frame; a non-bending part, which includes a camera configured to capture an image of a forward direction, and which is coupled to the main unit and is configured to slide to a first position; a hinge coupled with the non-bending part; and a bending part, which is configured to provide image information to a user, and which is coupled with the hinge to rotate within a predefined angle. When the bending part is rotated, the camera is exposed to the exterior and moves from the first position to a second position. The device prevents malfunctioning and damage even when the device is worn for extended periods, and it is possible to resolve the problem of the wearable display device obstructing the field of vision when not in use.