A transfer apparatus of a line end of a folder-gluer for cardboard boxes includes a transfer bed (1) with a double, opposite array of transmission belts (C1a, C1b, C2a, C2b) which define a transfer track for the displacement of flattened, folded boxes, wherein the transfer bed (1) is oscillatingly mounted about a horizontal axis (a-a′) on a U-shaped support structure (21, 22, 24) which is in turn rotatingly mounted according to a vertical axis (b-b′) on a base frame (26), the rotation according to the horizontal axis (a-a′) and according to the vertical axis (b-b′) occurring through a first (M1) and a second (M2 M2′) motor, respectively.