<p>A supporting board is provided to freely control the tilt angle of a seated objet. In order to seat an object, an upper side(111) of a main body(110) is formed as a flat type. In order to insert the tip-end part of the object into the front of the upper side, a seating groove(112) is formed. The upper side is combined with an inclination adjusting tool(120) to rotate through a hinge shaft. In a one side of the inclination adjusting tool, a folding unit(123) is formed. The inclination adjusting tool supports the backside of the object. A plurality of USB ports(131) including a recognition lamp(132) is formed. An access port(133) of a hub(130) is formed in one side of the USB port. A plurality of cooling fans(141) is formed inside of the main body. A plurality of ventilation holes(142) is formed in the upper side of the main body.</p>
