INSTRUCTION INPUT DEVICE, INSTRUCTION INPUT METHOD, PROGRAM, RECORDING MEDIUM, AND INTEGRATED CIRCUIT

An instruction input device includes: a first direction detection unit detecting the first direction in which the user is looking; a second direction detection unit detecting a second direction in which the user is performing a pointing operation; a gaze position calculation unit calculating a gaze position of the user on the screen; a reference coordinate group calculation unit calculating a reference line in space corresponding to the gaze position and connecting the user and the screen; an offset amount calculation unit calculating a distance of the second direction between the reference line and the input coordinate indicating the user's hand as an offset amount with respect to the gaze position; and a pointer display position calculation unit calculating a position in which a distance of the first screen predetermined direction between the position and the gaze position is the offset amount on the screen.