To provide a raw material heating device capable of effectively extruding a surface layer of raw material deposition having the most heating receiving by being pushed out with a pusher so that the raw material deposition on a hearth becomes a uniform fall amount in a circumferential direction.

A raw material heating device has a heating gas supply means 15 for supplying a heating gas heating a raw material deposited on the hearth to a heating space by forming the heating space F with a furnace cover 11, a circumferential wall 13, and the hearth 14 and being supplied from a raw material supply pipe. Rod-like pushers 16, 17 are moved in a longitudinal direction to be provided to extrude the raw material on the hearth toward a fall hole 14A of the hearth. The pusher has the upper stage pusher 16 and the lower stage pusher 17, and is arranged at a plurality of positions in a circumferential direction. The lower pusher 17 extends in a radial direction toward a center of the fall hole. The upper pusher 16 extends in a direction having a radial component and a tangential component.