An apparatus for manufacturing chain-like food products such as sausages or the like includes a stuffing nozzle over which a natural intestine is fitted and a pinching device for pinching and conveying a stuffed natural intestine in the forward direction of the stuffing nozzle. A stuffing material is discharged from a distal end of the stuffing nozzle into a straightened natural intestine portion of the natural intestine to form a stuffed natural intestine portion. The stuffed natural intestine portion is nipped, and is pulled as it is moved forwardly of the distal end of the stuffing nozzle to reduce the diameter of the straightened natural intestine portion so as to cause the straightened natural intestine portion to come into contact with an outer periphery of the stuffing nozzle. The stuffing nozzle with which the straightened natural intestine portion is brought into contact is rotated to rotate the stuffed natural intestine portion. The stuffed natural intestine portion being rotated and moved is pinched to form a twist. The discharge of the stuffing material into the straightened natural intestine portion is effected while the stuffed natural intestine portion and the straightened natural intestine portion are being moved.