A composite material may include at least one thermoplastic resin; and from 5 to 180 parts by weight of granular shive from hemp and/or flax, with respect to 100 parts by weight of the at least one thermoplastic resin, with particles having an average particle size lower than 0.2 millimeters (mm). A method for the manufacture of a composite material may include: melting the at least one thermoplastic resin; mixing the at least one molten resin with from 5 to 180 parts by weight, with respect to 100 parts by weight of the at least one thermoplastic resin, of granular shive from hemp and/or flax with an average particle size lower than 0.2 mm; and cooling the mixture obtained in order to form the composite material.