An information processing apparatus comprising: a display unit for displaying an image; an operation input receiving unit (16, 106) for receiving a user's operation performed on the display unit; and a display control unit (23, 101) for controlling the display unit and carrying out display control when the operation input receiving unit (16, 106) receives a predetermined operation, the display control allowing the state of a display of the display unit to transit from one of a first state of display in which the image is displayed and a second state of display in which an additional information image including one or more pieces of additional information associated with the image is displayed so as to mimic a virtual turning over of the displayed image to the other, characterized in that said display control unit (23, 101) is adapted to carry out display control to display an additional information access entrance in accordance with a first predetermined operation, to transit the display state in accordance with a second predetermined operation, wherein in the second predetermined operation the operation input receiving unit (16, 104) detects a tracing operation in which the user moves a finger by a predetermined distance with the finger touching the operation input receiving unit (16, 104) and starting at the information access entrance, and in that the information processing apparatus further comprises a detection unit for detecting an inclination of the information processing apparatus, and in that said display control unit (23, 101) is further adapted to perform the following control as the display control: to judge whether or not a fixed time period has elapsed since inclination of the information processing apparatus has been detected, to transit the display state only when the display control unit (23, 101) determines based on a detection result that the user carried out a first operation of rotating the information processing apparatus 180 or 90 degrees followed by a second operation of rotating the information processing apparatus the same amount in the opposite direction before the fixed time period has elapsed. a display unit for displaying an image; an operation input receiving unit (16, 106) for receiving a user's operation performed on the display unit; and a display control unit (23, 101) for controlling the display unit and carrying out display control when the operation input receiving unit (16, 106) receives a predetermined operation, the display control allowing the state of a display of the display unit to transit from one of a first state of display in which the image is displayed and a second state of display in which an additional information image including one or more pieces of additional information associated with the image is displayed so as to mimic a virtual turning over of the displayed image to the other, said display control unit (23, 101) is adapted to carry out display control to display an additional information access entrance in accordance with a first predetermined operation, to judge whether or not a fixed time period has elapsed since inclination of the information processing apparatus has been detected, to transit the display state only when the display control unit (23, 101) determines based on a detection result that the user carried out a first operation of rotating the information processing apparatus 180 or 90 degrees followed by a second operation of rotating the information processing apparatus the same amount in the opposite direction before the fixed time period has elapsed.