Abstract: Process for gasifying an organic material, comprising the following steps: subjecting an organic material to a drying phase to reduce its humidity content and obtain dry organic material and steam, and extracting said steam; subjecting the dry organic material to pyrolysis and generating a pyrolysis gas and a carbonaceous solid residue from the dry organic material, the pyrolysis gas containing a tar fraction; separating the pyrolysis gas from the carbonaceous solid residue, wherein separating the pyrolysis gas comprises extracting the pyrolysis gas and conveying it separately from the carbonaceous solid residue generated by the pyrolysis; subjecting the pyrolysis gas to a thermochemical treatment; and, after the thermochemical treatment, causing the treated pyrolysis gas to penetrate through a reducing bed (31) composed of the carbonaceous solid residue generated by the pyrolysis, and producing a synthesis gas.