an information recording apparatus comprises a vacuum chamber , an energy beam generator emitting an energy beam for recording information on a substrate in the vacuum chamber , a spindle motor rotating the substrate in the vacuum chamber , a movable holder disposed in the vacuum chamber for carrying the spindle motor , and a feed motor unit connected to the movable holder for linearly moving the substrate in a vacuum atmosphere within the vacuum chamber . the holder , the vacuum chamber , and the energy beam generator are fixed to a common plate - shaped base member . the feed motor unit is connected to the movable holder by means of a hollow rod , a flexible sleeve element being provided over the rod between the feed motor unit and the vacuum chamber wall .