Gymnastic machine for weightlifting, comprising: - a load-bearing frame, - two opposite first lateral guides (12, 13), extending in a first vertical direction, - two first slides (14, 15) each slidingly constrained on a corresponding first lateral guide (12, 13), - two opposite second lateral guides (16, 17), extending in a second direction transversal to said first vertical direction, and each defined on board of one of said first slides (14, 15), - two second slides (18, 19) each slidingly constrained on a corresponding second lateral guide (16, 17), - a lifting bar, each of the ends (20a, 20b) of said lifting bar being constrained to a corresponding second slide (18, 19), - motorised transmission means configured to apply on said first slides (14, 15) either an opposing force to an upward thrust force, or a downward traction force, characterized in that said motorised transmission means comprise two electric motors (22, 23) each of which is configured to actuate a corresponding longitudinally developed flexible element (24, 25), each longitudinally developed flexible element (24, 25) being connected at a first end to the lower part (14a, 15a) of a first slide (14, 15) of the two first slides, and at the second opposite end being connected to the upper part (14b, 15b) of the same first slide (14, 15), said motorised transmission means comprising, for each longitudinally developed flexible element (24, 25): - at least one lower pulley configured and positioned to deflect the longitudinally developed flexible element (24, 25) coming from the said electric motor (22, 23) towards the said lower part (14a, 15a) of the said first slide (14, 15), - at least one upper pulley (28, 29, 30, 31) configured and positioned to deflect the said longitudinally developed flexible element (24, 25) towards an upper part (14b, 15b) of the said first slide (14, 15). - a load-bearing frame, - two opposite first lateral guides (12, 13), extending in a first vertical direction, - two first slides (14, 15) each slidingly constrained on a corresponding first lateral guide (12, 13), - two opposite second lateral guides (16, 17), extending in a second direction transversal to said first vertical direction, and each defined on board of one of said first slides (14, 15), - two second slides (18, 19) each slidingly constrained on a corresponding second lateral guide (16, 17), - a lifting bar, each of the ends (20a, 20b) of said lifting bar being constrained to a corresponding second slide (18, 19), - motorised transmission means configured to apply on said first slides (14, 15) either an opposing force to an upward thrust force, or a downward traction force, characterized in that said motorised transmission means comprise two electric motors (22, 23) each of which is configured to actuate a corresponding longitudinally developed flexible element (24, 25), each longitudinally developed flexible element (24, 25) being connected at a first end to the lower part (14a, 15a) of a first slide (14, 15) of the two first slides, and at the second opposite end being connected to the upper part (14b, 15b) of the same first slide (14, 15), said motorised transmission means comprising, for each longitudinally developed flexible element (24, 25): - at least one lower pulley configured and positioned to deflect the longitudinally developed flexible element (24, 25) coming from the said electric motor (22, 23) towards the said lower part (14a, 15a) of the said first slide (14, 15), - at least one upper pulley (28, 29, 30, 31) configured and positioned to deflect the said longitudinally developed flexible element (24, 25) towards an upper part (14b, 15b) of the said first slide (14, 15). - at least one lower pulley configured and positioned to deflect the longitudinally developed flexible element (24, 25) coming from the said electric motor (22, 23) towards the said lower part (14a, 15a) of the said first slide (14, 15), - at least one upper pulley (28, 29, 30, 31) configured and positioned to deflect the said longitudinally developed flexible element (24, 25) towards an upper part (14b, 15b) of the said first slide (14, 15).