The aim of this study was to determine the quality of wood from Swietenia macrophylla in commercial plantation aged 20 years in the Central Amazon. The planting has a total of 100 hectares, with initial spacing of 7 m x 6 m. Five trees were selected for sampling by destructive method. The quality of the wood was evaluated considering the physical and mechanical properties. A completely randomized design was used considering a probability level of 95%. The only variable that did not show a significant difference between shafts was MOE compression. For the other variables, the stems with the best performances were those with a diameter between 25 cm and 35 cm. The wood from: Swietenia macrophylla in planting for 20 years, it has a high modulus of rupture, medium modulus of elasticity, medium shear strength, medium hardness and medium resistance to compression parallel to the fibers, indicating the possibility of use for commercial purposes.