Abstract: A device for the dissemination of a spreadable material, such as fertilizer in powder or granule form, which device consists substantially of a supported frame with storage holder 7 for the material for spreading, which holder 7 is provided with an outlet opening and a spreader pipe 10 driven for reciprocal swinging connected thereto, said spreader pipe 10 has near its free outflow opening means influencing the spread pattern, wherein a partition 12 is arranged extending in the central longitudinal plane of the pipe 10 and connecting to the bottom wall thereof and which protrudes freely from the pipe over a determined length, and to arrange above the transverse partition an extra rebound surface 31 which extends transversely of the lengthwise direction of the pipe behind the opening thereof, so being able to influence the spreading pattern such that the delivery onto the field is as even as possible.