An object of the present invention is to smoothly discharge even if the suction target is a highly viscous fluid without staying in the apparatus, and to prevent the drive mechanism from being adversely affected even if the suction target is a low viscosity fluid. A small medical suction device is provided. A main body 2 including a grip portion 20 and a distal end portion 21, a needle-like cylindrical body 3 attached to the distal end portion 21, and a suction conveyance unit rotatably accommodated in the needle-like cylindrical body 3. A screw 4 and a drive unit 6 that is housed in the main body 2 and drives and rotates the suction-conveying screw 4 are provided, and a distal end portion 21 of the main body 2 extends the needle-like cylindrical body 3 forward. The suction port 22a communicates with the needle-shaped cylindrical body 3 and has a suction port 22a that communicates with the needle-like cylindrical body 3. It is connected with the said drive part 6 through the counter screw 5 which acts on this. [Selection] Figure 1【課題】吸引対象物が粘性の高い流体であっても装置内に滞留することなくスムースに排出でき、また、吸引対象物が粘性の低い流体であっても駆動機構部に悪影響を及ぼさない新規な医療用小型吸引装置を提供する。【解決手段】グリップ部２０及び先端部２１を含む本体２と、前記先端部２１に装着される針状筒体３と、前記針状筒体３の内部に回転自在に収容される吸引搬送用スクリュー４と、前記本体２内に収容されて前記吸引搬送用スクリュー４を駆動回転させる駆動部６とを備え、前記本体２の先端部２１は、前記針状筒体３を前方に延出するよう支持すると共に、前記針状筒体３と連通する排出口部２２ａを有し、前記本体２の先端部２１内には、前記吸引搬送用スクリュー４が当該吸引搬送用スクリュー４とは逆向きに作用するカウンタースクリュー５を介して前記駆動部６に連結されていることを特徴とする。【選択図】図１
