to prevent rapid movement of a display in any direction even in the condition where the display is movable . a display supporting device includes a frictional force generating portion for generating frictional force in a direction opposite to a moving direction of a display when moving the display relative to a body of equipment , and biasing structure for applying a biasing force not less than a predetermined value to the frictional force generating portion in a direction perpendicular to the moving direction to make magnitude of the frictional force to be generated in the frictional force generating portion at least not less than a moving force .