NOVELTY - An apparatus comprises a pyrolysis section (2) arranged such that the heat necessary to decompose organic material (1) is generated by partially burning the organic material while it is in motion upwards in the pyrolysis section.    USE - For producing gasses from an organic material (claimed)    ADVANTAGE - Since the pyrolysis section itself generates heat necessary for pyrolysis, the system becomes simpler and more reliable since fewer system components are required. Furthermore, due to the simplicity of the system and the reduced number of interacting components, the efficiency of the system is higher and a greater yield will be generated when compared to existing systems. Since the heat generation happens inside the pyrolysis section, there are no external heat sources required, which means that the risk to people around the apparatus from dangerous gasses produced by extra heat sources is removed. In addition, since no external heat sources are required, the gasses output by the apparatus can be used for any purpose. In other words, there is no demand for a portion of the produced gasses to be used in an external heat source necessary to heat the pyrolysis section. Since the pyrolysis section is arranged so that the organic material moves up against gravity, the material will move around and not agglomerate. In addition, the partial combustion of the organic material will create heat and gasses, bubbles of which move upwards through the organic material in the pyrolysis section, further preventing agglomeration of material.    DETAILED DESCRIPTION - The organic material is filled in pyrolysis section and moved along while being exposed to heat in such a way that the organic material is decomposed into at least coke and gasses, a gas combustion section (9) where the generated gasses are mixed with air and at least partially burnt in order to generate the heat necessary to thermally crack the remaining gasses and heat the coke, and a hot reaction bed (12) where the coke, produced in the pyrolysis section and heated in the gas combustion section, is gasified.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic sectional view of an apparatus.    Organic material (1)    pyrolysis section (2)    feeder (3)    reaction bed (12)    discharger. (15)