Sowing machine for distributing seeds on the ground, which comprises: - a support frame intended to be fixed to a tractor at coupling points; - at least one hopper for containing seeds to be distributed, supported by said support frame; - at least one sowing unit provided with: - a support structure mechanically connected to said support frame; - at least one distribution disc rotatably mounted on said support structure in a position raised from the ground and carrying, peripherally mounted thereon, a plurality of equidistant distribution spouts; - distribution means mounted on said support structure connected to said containment hopper in order to receive said seeds therefrom, and cyclically in communication with said distribution spouts in order to release a dose of said seeds at their interior; - first motorization means connected to said distribution disc in order to rotate it around a rotation axis substantially orthogonal to the advancement direction of said sowing machine; said machine being characterized in that said distribution means comprise: - a rotor peripherally provided with a plurality of equidistant cells, each adapted to contain a dose of seeds to be distributed; - a stator fixed to said support structure, externally around said rotor, and provided with: - at least one first opening for cyclically feeding said cells with said doses of seeds; - a second opening for receiving said doses of seeds from said cells and cyclically discharging them into said distribution spouts of said plurality of spouts; - at least one manifold mechanically associated with said first opening of said stator connected with said containment hopper and cyclically with said cells in order to transfer thereto doses of said seeds to be distributed; - second motorization means connected to said rotor in order to rotate it inside said stator in order to cyclically face said cells at said first opening; wherein said second motorization means comprise at least one motor fixed to said support structure or to said stator; second transmission means being connected to said motor and to said rotor in order to rotate the latter; - a logic control unit electrically connected to said first motorization means and to said second motorization means, which controls said first motorization means and said second motorization means, synchronizing the position of said distribution spouts and of said cells at said second opening. - a support frame intended to be fixed to a tractor at coupling points; - at least one hopper for containing seeds to be distributed, supported by said support frame; - at least one sowing unit provided with: - a support structure mechanically connected to said support frame; - at least one distribution disc rotatably mounted on said support structure in a position raised from the ground and carrying, peripherally mounted thereon, a plurality of equidistant distribution spouts; - distribution means mounted on said support structure connected to said containment hopper in order to receive said seeds therefrom, and cyclically in communication with said distribution spouts in order to release a dose of said seeds at their interior; - first motorization means connected to said distribution disc in order to rotate it around a rotation axis substantially orthogonal to the advancement direction of said sowing machine; - a support structure mechanically connected to said support frame; - at least one distribution disc rotatably mounted on said support structure in a position raised from the ground and carrying, peripherally mounted thereon, a plurality of equidistant distribution spouts; - distribution means mounted on said support structure connected to said containment hopper in order to receive said seeds therefrom, and cyclically in communication with said distribution spouts in order to release a dose of said seeds at their interior; - first motorization means connected to said distribution disc in order to rotate it around a rotation axis substantially orthogonal to the advancement direction of said sowing machine; - a rotor peripherally provided with a plurality of equidistant cells, each adapted to contain a dose of seeds to be distributed; - a stator fixed to said support structure, externally around said rotor, and provided with: - at least one first opening for cyclically feeding said cells with said doses of seeds; - a second opening for receiving said doses of seeds from said cells and cyclically discharging them into said distribution spouts of said plurality of spouts; - at least one first opening for cyclically feeding said cells with said doses of seeds; - a second opening for receiving said doses of seeds from said cells and cyclically discharging them into said distribution spouts of said plurality of spouts; - at least one manifold mechanically associated with said first opening of said stator connected with said containment hopper and cyclically with said cells in order to transfer thereto doses of said seeds to be distributed; - second motorization means connected to said rotor in order to rotate it inside said stator in order to cyclically face said cells at said first opening; wherein said second motorization means comprise at least one motor fixed to said support structure or to said stator; second transmission means being connected to said motor and to said rotor in order to rotate the latter; - a logic control unit electrically connected to said first motorization means and to said second motorization means, which controls said first motorization means and said second motorization means, synchronizing the position of said distribution spouts and of said cells at said second opening.