To readily avoid misbinding even when there is an increase in volume of collected grain culms in a binding device for the grain culms in which a string knotting part having a string holder and a knotting bill mutually oppose to a string feeding part having a string feeding needle with a grain culm bundling space placed therebetween. 紐ホルダ及び結節ビルを有した紐結節部と、紐供給ニードルを有した紐供給部とが茎稈収束空間を挟んで対向し合っている茎稈結束装置において、収集茎稈のボリューム増大があっても結束ミスを回避しやすくする。 - 特許庁