The fluid material dividing device includes an outer valve having a suction hole and a discharge hole and formed in a cylindrical shape from the front wall to the rear end and the rear end opening, and fitted into the outer valve from the rear end opening toward the front front wall. A rotating inner valve having a communicating hole selectively communicating with the suction hole and the discharge hole in the peripheral wall and formed in a cylindrical shape from the closed inner end to the outer opening end, and the rotating inner valve closed from the outer opening end The rotation is performed so that the volume of the accommodating chamber of the rotation inner valve defined between the insertion tip surface and the inner wall surface of the closed inner end can be adjusted while being closely fitted toward the inner end. A plug member fixed to the inner valve is provided, and air vent holes are formed in the upper side of the outer peripheral wall of the outer valve and the upper side of the fitting peripheral wall of the inner valve, respectively, thereby reducing the number of parts of the fluid material dividing device Can do.流体物小分け装置は、吸引孔及び吐出孔を有すると共に閉塞前壁と後端開口まで筒状に形成された外弁と、この外弁に後端開口から閉塞前壁に向かって嵌入すると共に嵌合周壁に吸引孔及び吐出孔に選択的に連通する連通孔を有しかつ閉塞内端と開口外端まで筒状に形成された回動内弁と、回動内弁に開口外端から閉塞内端に向かって密嵌合状態に挿嵌すると共に挿入先端面と閉塞内端の内壁面の間で画定される回動内弁の収容室の容積を調整することができるように該回動内弁に固定される栓部材とを備え、外弁の外周壁の上部側と内弁の嵌合周壁の上部側には、空気抜き孔がそれぞれ形成され、流体物小分け装置の部品点数の削減化ができる。
