1. A head mounted display (HMD) comprising: a display unit configured to output an image; a communication unit configured to transmit and receive video communication image data; a camera unit configured to take an image in a forward direction of the HMD; and a processor configured to control the display unit, the communication unit and the camera unit, wherein the processor is further configured to: detect an image of a user wearing the HMD from the taken image, wherein the image of the user is a reflected image in a reflector and includes a camera area of the HMD, and wherein the camera area includes at least one of a reflected image of the camera unit, a reflected image of the HMD and a reflected image of a middle of the user's forehead, recognize an image of a partner from the received video communication image data, provide a video communication interface displaying the recognized image of the partner, wherein the video communication interface displays the recognized image of the partner corresponding to a position of the camera area of the HMD, and transmit a video communication image of the user from the taken image, wherein, when a size of the recognized image of the partner is within a predetermined size range, the processor is configured to display an eye area in the recognized image of the partner corresponding to the position of the camera area of the HMD.