Electronic device, input device, and portable electronic device using the same

An electronic device, comprising:

• an operating unit further comprising a first button provided in a center portion, a second button arranged on an outer side to surround the first button;
• a displaying unit;
• and a controlling unit that controls a display on the displaying unit in response to an operation of the operating unit, the display comprising a menu and a submenu;
• wherein the operating unit senses a first pressure around the diameter of the first button in an operation direction and an operation speed without rotational movement of the first button;
• wherein the controlling unit changes an item on the menu of the display based on a first sensed result in accordance with the operation applied to the operating unit;
• wherein the operating unit senses a second pressure around the diameter of the second button in an operation direction and an operation speed without rotational movement of the second button;
• wherein the controlling unit changes an item on the submenu of the display based on a second sensed result in accordance with the operation applied to the operating unit.