Abstract: The present invention comprises a method and apparatus for automatically halving and processing the breasts and backs of poultry carcasses while the carcasses are still moving along a poultry processing line. The carcasses are pulled along the length of an internal guide rail (29) for processing. A rotary halving blade (48) positioned initially below the internal guide rail (29) is movable upwardly to engage and cut the breast into halves. After the breast has been split in half by the rotary halving blade (42), a pair of rotary separator blades (48) cut through the back of the carcass between the breast and thighs of the carcass to separate the breast and upper back from the legs, thighs and lower back of the carcass. A pair of back removal blades (61) positioned above the internal guide rail (29), the rotary separator blades (48) removes the upper backbone from the breast.