The invention relates to a horizontal shaping device, in particular for horizontal tubular-bag machines, comprising at least one, in particular roller-free, shaping unit (12), in particular a shaping shoulder, and comprising at least one support unit (14) which, together, are designed to shape a packaging-material web (16), in particular a paper web, to form a packaging-material tube (18), wherein the support unit (14) comprises at least one, in particular movably mounted, upper support element (20, 22), which is arranged on a side of the support unit (14) facing the shaping unit (12) and is designed to delimit, together with a shaping tunnel (24) of the shaping unit (24), at least one guide gap (26, 28) between the shaping unit (12) and the support unit (14), through which gap the packaging-material web (16) can be guided in order to shape the packaging-material tube (18). According to the invention, the support unit (14) comprises at least one lower support element (30, 32), which is arranged on a side of the support unit (14) facing away from the shaping unit (12) and is mounted so as to be movable relative to the upper support element (20, 22) and / or relative to the shaping unit (12).