Provided is an augmented reality providing apparatus capable of preventing an image sickness and reduction of a third party. When a position measurement reliability is less than a first threshold and a movement of HMD 100 is a second threshold or more, the HMD 100 does not output the same virtual combined images as that displayed on display units 3R, 3L, but outputs virtual combined image having been stored in an image storing unit 17 and displayed on the display units 3R, 3L previously to an external display device.