Abstract: Apparatus for turning over individual boards assembled as a stack, preferably for leafing the program boards of a music box (juke box) is provided, in which boards may be rotated around mutually parallel pivot axes lying in a plane, pivoting bilaterally with the edge area of one side on mutually straight profile sections which can be moved synchronously in guides of a chassis by a drive in a straight line in both directions. The boards are provided with projections extending beyond the pivots, at which a stay fixed to the chassis engages in such a way that in each case, a diagonally supported board lying in a viewing window of the chassis is turned over to the opposite side, in which position it is supported at an approximately identical, mirror-image angle.