NOVELTY - The pelletizing press for the production of biomass for use as fuel material in fireplaces, where the biomass consists of cellulose- and/or lignocellulose-containing fibers, chips, or shreds, comprises single- or multiple matrix (4) with holes (13) for pressing the biomass, a roller (5) rolling on a roller surface of the matrix, and a drive device for the matrix and/or the roller, where a support means is arranged for fixing the matrix in the pelletizing press in the operative position. An intermediate layer is arranged between the matrix segments and the support means.    USE - Pelletizing press useful for the production of biomass for use as fuel material in fireplaces.    ADVANTAGE - The pelletizing press ensures simple, effective and economical production of biomass with high quality.    DETAILED DESCRIPTION - The pelletizing press for the production of biomass for use as fuel material in fireplaces, where the biomass consists of cellulose- and/or lignocellulose-containing fibers, chips, or shreds, comprises single- or multiple matrix (4) with holes (13) for pressing the biomass, a roller (5) rolling on a roller surface of the matrix, and a drive device for the matrix and/or the roller, where a support means is arranged for fixing the matrix in the pelletizing press in the operative position. An intermediate layer is arranged between the matrix segments and the support means for forming a uniform roller surface of the matrix from different height matrix segments, and/or an actuating device for the matrix segments. A hydraulic and/or pneumatic positioning device is arranged on the and/or as support means. A carrier plate (9) is arranged with a break through (8) for releasing the holes of the matrix, where each hole is arranged in a larger break through in the carrier plate. The intermediate layer is implemented as insulation and/or as damping. A plastic, insulation, a metal plate and/or a hydraulic or pneumatic cushion is arranged as intermediate layer. A guide means is arranged between the carrier plate and the matrix for fixing the position and/or the margin of the matrix to the carrier plate. A clamping sleeve and/or a side wall is arranged at a part of the edge of the matrix as guide means. The guide means is implemented as a stop for adjusting the rolling surface through the intermediate layer and/or the positioning device. The matrix consists of a first material and the carrier plate consists of a second material. The carrier plate is implemented as carrier ring in a ring matrix with externally or internally rotating roller. Means for locking and un-locking the matrix and/or matrix segments are arranged in the pelletizing press. An INDEPENDENT CLAIM is included for a method for operating a pelletizing press for the production of pellets from biomass.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of a matrix and carrier plate of pelletizing press.    Matrix (4)    Roller (5)    Breakthrough (8)    Carrier plate (13) Holes. (9)