New methods of modifying wood such as furfurylation have appeared in recent decades. The polymerization of furfurylic alcohol with cellulose and lignin improves the resistance to wood decaying fungi (Sejati et al., 2017). Nevertheless, environment behavior evaluation of furfurylic residues is poorly documented (Dong et al., 2020) with a few studies on the ecotoxicity of leachates from furfurylated wood (Lande et al., 2004; Pilgård et al., 2010). Thus, effects of furfuryl wood treatment residues on the environment was followed during 2 years using outdoor lysimeters filled with three representative soils of Lorraine. Samples of beech wood (20 x 2 x 0.5 cm) untreated, or treated with tanalith or furfurylic alcohol have been planted in soil columns. In addition, ecotoxicity tests were performed in different ways of exposure: aquatic organisms were exposed to leachates and terrestrial organisms were exposed to lysimeter soils. Whatever the soil, the wood degradation was faster for the control compared to tanalith or furfuryl treatments. The levels of treatment residues in percolates are below the LOQs for azoles and furfuryl alcohol, and reached up to 30 µ/L for copper. No effect of percolates was observed on rotifers and daphnids. A lower effect on growth of algae was observed with furfurylated wood compared to tanalith. In soils, the levels of treatment residues are lower than the LOQs for azoles and furfuryl alcohol. Copper contents reached 47 mg/kg in the 0-5 cm topsoil. Rapeseed and oat were grown on lysimeter soils: no effect of wood treatment was observed.