The present invention relates to a cutting blade structure for a combine harvester and, more specifically, to a cutting blade structure for a combine harvester which comprises a middle cutting member between an upper cutting member and a lower cutting member and allows the middle cutting member to cut grain such as rice and the like at two points while reciprocating. The present invention comprises: an upper cutting member (10) which has a plurality of upper cutting blades (15) coupled to one side thereof toward the front along the lengthwise direction a lower cutting member (20) which is provided at the lower section of the upper cutting member (10), and which has a plurality of lower cutting blades (25) coupled at positions corresponding to the upper cutting blades (15) a middle cutting member (30) which is installed between the upper cutting member (10) and the lower cutting member (20) so as to reciprocate horizontally, and which has middle cutting blades formed in close contact with the upper cutting blades (15) and the lower cutting blades (25), respectively, so as to cut two points of rice and a cutting member fixing part (40) which is installed on the upper section of the upper cutting member (10) so as to couple only the upper cutting member (10) and the lower cutting member (20) to each other, and which causes the upper cutting blades (15), the middle cutting blades, and the lower cutting blades (25) to be in close contact with one another.La présente invention concerne une structure de lame de coupe pour une moissonneuse-batteuse et, plus précisément, une structure de lame de coupe pour une moissonneuse-batteuse qui comprend un élément de coupe médian, entre un élément de coupe supérieur et un élément de coupe inférieur, et qui permet à lélément de coupe médian de couper un grain tel que le riz et autre au niveau de deux points tout en se déplaçant en va-et-vient. La présente invention comprend : un élément de coupe supérieur (10) qui possède une pluralit
