A process for trussing up meat attached to at least one bone of a poultry part around an end of the poultry part, which includes the steps of loading each of a series of poultry parts into a trussing up unit at a loading position and positioning the bones of the poultry part into a bone positioning device, displacing each trussing up unit from a loading position towards and along a trussing up pathway and fixing the bones into the bone positioning device, displacing at least one bone partly through the meat through at least one bone positioning device by a pusher, retracting at least one of the bones from the meat and removing the trussed up poultry part.