the invention relates to a moulded body containing plastic and reinforced by natural fibres . said moulded body is produced from fibrous plant or animal material containing residual water , at least one thermoplastic or duroplastic material , and at least one water - binding biopolymer and / or biomonomer , by means of plastic or thermoplastic deformation at a high temperature and / or high pressure , and then by shaping , preferably by means of extrusion . in spite of a residual water content of between 0 . 3 and 8 wt . %, the inventive moulded body is in an unexpanded form . the invention also relates to a method for producing said moulded body .