The general objective of this work was to compare the physical properties of solid biofuels obtained from the seeds of Mauritia flexuosa l., Oenocarpus bataua mart and Euterpe oleracea. The research has a comparative descriptive approach. The study population was made up of all the seeds of Mauritia flexuosa l., Oenocarpus bataua mart and Euterpe oleracea from the province of Maynas that are sold in the Belén and Modelo markets. The type of sampling was non-random at the discretion of the authors of this work, it was considered a sample size 3000 g. of Mauritia flexuosa l. seeds, 3000 g. of Oenocarpus bataua mart seeds and 3000 g. of Euterpe oleracea seeds. The results of the average values obtained regarding the biometric properties of the seeds were. for Mauritia flexuosa l., length 49.10 mm, diameter 30.42 mm and weight 27.26 g, Oenocarpus bataua mart, length 28.18 mm, diameter 20.61...