This interface device for link designation is equipped with: a range designation means (110) with which it is possible to designate a desired range on a screen on which video content is being played; a range mark setting means (107b) that displays a range mark indicating the designated range, said mark being superimposed upon the video content; a movement operation means (110, 105, 107b) with which it is possible to move the range mark on the screen in a desired direction as the playback time of the video content passes; a link input means (110) with which it is possible to input link identification information corresponding to the range mark; and a storage means (106) that stores location information that indicates locations of the range mark in association with link identification information and times within the playback time.