The invention relates to a soil-working tool (20), in particular a cultivator beam for crop production, having a fastening portion (21) and a working part (22) adjoining the same directly or indirectly. A wear-optimized design of the soil-working tool (20) is achieved according to the invention in that the fastening portion (21) has two spaced-apart supporting surfaces (21.6, 21.8), which form part of a fitting connection.
