Abstract: The device for sampling material of granular or powdery composition includes a stem at one end of which a wheel is mounted intended to cause the device to rotate. At the opposite end is a driving head. The head is mounted symmetrically on the stem and includes lower and side parts of a streamlined shape. The stem has a predetermined shape to scrape material nover the entire driving depth of the device in the material to be sampled. The head has a cross section that is smaller than, equal to, or greater than the cross section of the stem and in proportions determined in relation to the nature or moisture content of the material to be sampled.