A device for removing abdominal fat from a slaughtered bird, comprising a scraper element which is movable through an abdominal opening between the legs, and a device for discharging the fat scraped off by the scraper element, further comprising an elongated hollow mandrel, which can be connected to a vacuum source. The mandrel at the end facing the bird is provided with a suction aperture, at a distance from which the scraper element is fitted, said scraper element being provided with a scraping edge for interacting with the complementary-shaped edge of a supporting element, for scraping the abdominal fat along the scraping edge during a movement of the scraper element interacting with the supporting element away from the bird. An installation may comprise a number of such devices. In a method for operating the device the scraper element is inserted into the belly cavity of the bird; the skin with the abdominal fat is sucked into the mandrel; the supporting element is moved to the scraping edge, leaving a narrow gap; and the scraper element and the supporting element are moved away from the bird.