A disk loading apparatus (1, 1A) for loading a disk to a loaded position, comprising: an apparatus body having an insertion opening corresponding to a diametrical dimension of the disk and having the loaded position therein to which the disk inserted into the insertion opening is to be positioned; a pair of arms (31, 32) disposed in a substantially symmetrical relationship with each other with respect to a virtual straight line extending along the loading direction of the disk and passing a substantially central position of the insertion opening and supported at one end thereof for pivotal motion such that the other ends thereof are spaced away from each other to load the disk; means (318, 324) for biasing the pair of arms (31, 32) towards one another; and a pair of link arms (33, 34, 34A) disposed in a substantially symmetrical relationship with each other around the virtual straight line and in a crossing relationship with each other and supported for pivotal motion such that ends thereof are spaced away from each other to synchronize the pivotal motion of the arm with which one of said link arms is engaged and the pivotal motion of the arm with which the other of said link arms is engaged with each other; wherein: at least one of said link arms has a restricting portion (333, 343) adapted to abut with an end edge of the disk loaded to the loaded position to restrict the movement of the disk in the loading direction; said arms each having a supporting member (313, 323) the restricting portions and the supporting members being adapted to support the disk at three or four points thereof when the disk is positioned at the loaded position. an apparatus body having an insertion opening corresponding to a diametrical dimension of the disk and having the loaded position therein to which the disk inserted into the insertion opening is to be positioned; a pair of arms (31, 32) disposed in a substantially symmetrical relationship with each other with respect to a virtual straight line extending along the loading direction of the disk and passing a substantially central position of the insertion opening and supported at one end thereof for pivotal motion such that the other ends thereof are spaced away from each other to load the disk; means (318, 324) for biasing the pair of arms (31, 32) towards one another; and a pair of link arms (33, 34, 34A) disposed in a substantially symmetrical relationship with each other around the virtual straight line and in a crossing relationship with each other and supported for pivotal motion such that ends thereof are spaced away from each other to synchronize the pivotal motion of the arm with which one of said link arms is engaged and the pivotal motion of the arm with which the other of said link arms is engaged with each other; wherein: at least one of said link arms has a restricting portion (333, 343) adapted to abut with an end edge of the disk loaded to the loaded position to restrict the movement of the disk in the loading direction; said arms each having a supporting member (313, 323) the restricting portions and the supporting members being adapted to support the disk at three or four points thereof when the disk is positioned at the loaded position. at least one of said link arms has a restricting portion (333, 343) adapted to abut with an end edge of the disk loaded to the loaded position to restrict the movement of the disk in the loading direction; said arms each having a supporting member (313, 323) the restricting portions and the supporting members being adapted to support the disk at three or four points thereof when the disk is positioned at the loaded position.