PROBLEM TO BE SOLVED: To provide an indwelling needle assembly that can improve stability of a posture in needling.SOLUTION: An indwelling needle assembly includes: an inner needle having a sharp needle tip in the distal end； a hollow outer needle with the inner needle inserted therein； an outer needle hub body having an inner hole with an inner needle inserted therein and mounted with the outer needle in an opening of the distal side； an outer needle hub having a tube mounting part provided in the peripheral surface of the outer needle hub body and mounted with a tube； and an inner needle hub provided at a proximal end side of the inner needle protruding from the outer needle hub, and provided in a relatively displacing manner to the outer needle hub. The inner needle hub has the inner needle hub body where the inner needle is mounted in the distal end, and a wing part provided in the inner needle hub body and projected into the distal side from the inner needle hub body. The wing part has a plate-like gripping portion positioned at the distal side of the wing part and having a gripping surface on both sides. The gripping portion is positioned in the vicinity of the outer needle hub body. The outer needle hub body has a non-slip part in the outer circumferential surface of the outer needle hub body. The non-slip part is positioned in the vicinity of the gripping portion.SELECTED DRAWING: Figure 1【課題】 穿刺時における姿勢の安定性を向上させることができる留置針組立体を提供する。【解決手段】 留置針組立体は、遠位端部に鋭利な針先を有する内針と、内針が挿通されている中空の外針と、内針が挿通されている内孔を有し且つ遠位側の開口部に外針が取り付けられる外針ハブ本体と、外針ハブ本体の周面に設けられ且つチューブが取り付けられるチューブ取付部とを有する外針ハブと、外針ハブから突出する内針の近位端側に設けられ、外針ハブに対して相対変位可能に設けられる内針ハブとを備え、内針ハブは、内針が遠位端部に取り付けられる内針ハブ本体と、内針ハブ本体に設けられ且つ内針ハブ本体から遠位側に突出している翼部とを有し、翼部は、翼部の遠位側に位置し且つ両面に把持面を有する板状の把持部分を有し、把持部分は、外針ハブ本体の近傍に位置し、外針ハブ本体は、外針ハブ本体の外周面に滑り止め部を有し、滑り止め部は、把持部分の近傍に位置している。【選択図】 図１
