A transpedicular polyaxial screw, especially a transpedicular polyaxial screw with eccentrically mounted threaded rod, comprising a head, a threaded rod with a spherical end, an upper thrust element and a lower thrust element, the screw head (1) being provided of a groove (7) from above in which a fixing rod (3) is placed, the fixing rod (3) is fixed with the upper thrust element (2) also fixed in the screw head (1) where the lower part of the groove (7) is connected to the outer side (8) of the screw head (1) through an opening (9) that exits eccentrically in the transition of the base and the outer side (8) of the screw head (1), the upper surface of the lower thrust element (4) is in contact with the fixing rod (2) and the lower surface of the lower thrust element (4) is in contact with the spherical end (5) of the stem ro scado (6), characterized in that in the opening (9), the lower thrust element (4) and the spherical end (5) of the threaded rod (6) are placed, and the lower thrust element (4) presses the spherical end (5) of the threaded rod (6) with respect to the opening wall (9) in the screw head (1).Un tornillo poliaxial transpedicular, especialmente un tornillo poliaxial transpedicular con vástago roscado excéntricamente montado, que comprende una cabeza, un vástago roscado con un extremo esférico, un elemento de empuje superior y un elemento de empuje inferior, estando la cabeza del tornillo (1) dotada de una ranura (7) desde arriba en la que se coloca una varilla de fijación (3), la varilla de fijación (3) se fija con el elemento de empuje superior (2) fijado también en la cabeza del tornillo (1) donde la parte inferior de la ranura (7) está conectada con el lado exterior (8) de la cabeza del tornillo (1) a través de una abertura (9) que sale excéntricamente en la transición de la base y el lado exterior (8) de la cabeza del tornillo (1), la superficie superior del elemento de empuje inferior (4) está en contacto con la varilla de fijación (2) y la sup
