PURPOSE: To provide both a method for feeding and conveying a food at a low cost by which response to physical properties can be mad even when various changes are caused in the physical properties over a wide temperature range of about -20 to about +20°C in a plastic oil and fat food, especially butter and preventing effects on contamination with microorganisms are manifested and an apparatus used therefor.

CONSTITUTION: This method for feeding and conveying a food is to take in the food from an intake port of an apparatus for feeding and conveying comprising two-axle nearly complete meshing type screws 2 both having the cross sections in the axle direction of thread ridges comprising a trapezoidal shape and a barrel 4 surrounding the screws 2, rotate the screws in the mutual different directions, form a nearly hermetically sealed space between parts where the thread ridges and roots of the screws 2 are not directly meshed and the barrel 4 and quantitatively convey and discharge the food utilizing a conveying chamber formed in the space.