The invention relates to a device for shaping a blank into a hollow profiled element comprising at least one base plate, onto which the blank that is to be shaped can be placed, at least one die core for the hollow profiled element and at least two die halves for shaping the blank into the hollow profiled element, as well as a method for producing a hollow profiled element with at least one molded-on stiffening and/or functional element made from a blank. The aim of providing a device for producing a hollow profiled element comprising at least one molded-on stiffening and/or functional element made from a blank, by means of which corresponding hollow profiled elements can be produced at low cost, which at the same time ensure high reliability of the process when different hollow profiled elements are joined together, is achieved with a generic device, wherein at least one die (15) is provided, by means of which an element structure (3, 4) which is introduced into the planar blank can be shaped and/or fixed into a stiffening and/or functional element (7, 8, 16).