A tag information display control apparatus disclosed allows information regarding a particular partial region in moving pictures to be displayed on a screen only by clicking the partial region. Movement of a pointer in a screen by a viewer of a main image is accepted, and the position of the pointer in the screen is acquired. A key image reproduced in synchronism with the main image is referred to decide whether the pointer is within a key region. Region identification information set with regard to the key region is read out when the pointer is within the key region. Index information with link information is referred to based on the region identification information together with time information of the key image to read out corresponding link information. Related information is acquired from a linking destination specified with the link information and is displayed.