Pneumatic dispenser for sowing multiform seeds in low and high doses, comprising: a housing consisting of a first half and a second half with means of closure that fix both halves to each other, wherein the first half comprises a channel for the entry of seeds and having on the periphery a plurality of air recirculation slots, and the second right half comprises an air suction tube; and, means of attachment to a seeder bracket and, underneath, a seed release sector linked to an exhaust tube; the pneumatic dispenser further internally houses a rotatable sowing plate mounted on a three-segmented drive shaft whose center is substantially cylindrical, centering the sowing plate with a drive plate, wherein the sowing plate comprises a plurality of cavities arranged perimetrically surrounded by depressions in low relief; said dispenser also comprises a set of floating triple upper contact and double lower contact flushes linked together by means of a bridge, wherein, the set has an upper clamp with an eccentric shaft that gives it movement and offset for a permanent contact against the surface of the sowing plate and with external regulation of its position, and a second point of connection consisting of a fixed shaft that constitutes a center of rotation of the set, wherein, on said bridge, there is a ledge with for the assembly of a compression spring that regulates the permanent contact of said flushes on the sowing plate, and wherein the triple upper contact is configured to act on the circumference of the outer tangent of the seed plate cavities and the double lower contact is configured to act on the circumference of the inner tangent of the seed plate cavities. a housing consisting of a first half and a second half with means of closure that fix both halves to each other, wherein the first half comprises a channel for the entry of seeds and having on the periphery a plurality of air recirculation slots, and the second right half comprises an air suction tube; and, means of attachment to a seeder bracket and, underneath, a seed release sector linked to an exhaust tube; the pneumatic dispenser further internally houses a rotatable sowing plate mounted on a three-segmented drive shaft whose center is substantially cylindrical, centering the sowing plate with a drive plate, wherein the sowing plate comprises a plurality of cavities arranged perimetrically surrounded by depressions in low relief; said dispenser also comprises a set of floating triple upper contact and double lower contact flushes linked together by means of a bridge, wherein, the set has an upper clamp with an eccentric shaft that gives it movement and offset for a permanent contact against the surface of the sowing plate and with external regulation of its position, and a second point of connection consisting of a fixed shaft that constitutes a center of rotation of the set, wherein, on said bridge, there is a ledge with for the assembly of a compression spring that regulates the permanent contact of said flushes on the sowing plate, and wherein the triple upper contact is configured to act on the circumference of the outer tangent of the seed plate cavities and the double lower contact is configured to act on the circumference of the inner tangent of the seed plate cavities.