A steam dryer for evaporating of water and/or other liquid from wet materials or evaporating of materials in a liquid state, comprising: a cylindrical rotatable drum having a shell with an inner face and an outer face and provided with a feed end structured and arranged to receive wet material or material in a liquid state into the drum the feed end being delimited by a feed end plate, and a discharge end structured and arranged to discharge vapour and dried material or remaining liquid from the drum the discharge end being equipped with a discharge end plate, a plurality of steam pipe elements each of which comprises two axial pipes parallel to a longitudinal direction of the drum and interconnected by a plurality of longitudinally spaced transverse intermediate pipes, the steam pipe elements being structured and arranged to be inserted within the drum and being rotatable therewith, a stationary end chamber structured and arranged at the discharge end area of the drum, a steam distributor manifold structured and arranged at the discharge end of the drum coaxially with said drum, and conveyance means disposed at the feed end of the drum and structured and arranged for supplying the wet materials or the materials in a liquid state into the steam dryer for evaporating, characterized in that the stationary end chamber is arranged at the discharge end area of the drum in the axial direction between the discharge end plate and the feed end plate such that the discharge end plate is situated outside of the discharge end chamber, said discharge end chamber surrounding a portion of the drum and having a lower opening to discharge dried material or remaining liquid therethrough from the drum and from the discharge end chamber and an upper opening to discharge vapour therethrough from the drum and from the discharge end chamber, and that the steam distributor manifold is arranged at the discharge end of the drum outside of the discharge end plate to supply the steam pipe elements with steam intended for evaporating of water and/or other liquid from wet materials or evaporating of materials in a liquid state as said materials pass through the drum and for removing condensate formed in the steam pipe elements, and that a dam plate is structured and arranged in the drum at the discharge end area of the drum at a distance from the discharge end plate, the dam plate having an opening formed therein through which opening dried material, remaining liquid and vapour are discharged from the drum into the stationary end chamber, the discharge end plate and the dam plate being provided with holes (17a, 32a) through which the axial pipes of the steam pipe elements are led. a cylindrical rotatable drum having a shell with an inner face and an outer face and provided with a feed end structured and arranged to receive wet material or material in a liquid state into the drum the feed end being delimited by a feed end plate, and a discharge end structured and arranged to discharge vapour and dried material or remaining liquid from the drum the discharge end being equipped with a discharge end plate, a plurality of steam pipe elements each of which comprises two axial pipes parallel to a longitudinal direction of the drum and interconnected by a plurality of longitudinally spaced transverse intermediate pipes, the steam pipe elements being structured and arranged to be inserted within the drum and being rotatable therewith, a stationary end chamber structured and arranged at the discharge end area of the drum, a steam distributor manifold structured and arranged at the discharge end of the drum coaxially with said drum, and conveyance means disposed at the feed end of the drum and structured and arranged for supplying the wet materials or the materials in a liquid state into the steam dryer for evaporating, characterized in that the stationary end chamber is arranged at the discharge end area of the drum in the axial direction between the discharge end plate and the feed end plate such that the discharge end plate is situated outside of the discharge end chamber, said discharge end chamber surrounding a portion of the drum and having a lower opening to discharge dried material or remaining liquid therethrough from the drum and from the discharge end chamber and an upper opening to discharge vapour therethrough from the drum and from the discharge end chamber, and that the steam distributor manifold is arranged at the discharge end of the drum outside of the discharge end plate to supply the steam pipe elements with steam intended for evaporating of water and/or other liquid from wet materials or evaporating of materials in a liquid state as said materials pass through the drum and for removing condensate formed in the steam pipe elements, and that a dam plate is structured and arranged in the drum at the discharge end area of the drum at a distance from the discharge end plate, the dam plate having an opening formed therein through which opening dried material, remaining liquid and vapour are discharged from the drum into the stationary end chamber, the discharge end plate and the dam plate being provided with holes (17a, 32a) through which the axial pipes of the steam pipe elements are led.