PROBLEM TO BE SOLVED: To provide a puncture device with a novel structure capable of preventing misoperation of a user of puncture operation and disposal operation, and preventing an unused lancet with a protector from being discharged.SOLUTION: A puncture device 10 causes a hub 98 with a puncture needle 12 to install a lancet 14 to which a protector 96 for covering a needle tip before puncture is assembled to perform puncture operation. The puncture device includes: a puncture operation part 84 that causes a hub hold member 34 holding the hub 98 to project so as to perform puncture operation a disposal operation part 68 that releases the hold of the hub 98 by the hub hold member 34 and a misoperation prevention mechanism for preventing the disposal operation part 68 from operating before the puncture operation part 84 performs the puncture operation.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】使用者による穿刺操作と廃棄操作の誤操作を防止することができて、未使用状態のプロテクタ付ランセットが排出されることがない、新規な構造の穿刺器具を提供する。【解決手段】穿刺針12を備えたハブ98が穿刺前に針先を覆うプロテクタ96に組み付けられたランセット14を装着して穿刺作動させる穿刺器具10であって、ハブ98を保持せしめたハブホールド部材34を突出させて穿刺作動させる穿刺操作部と84、ハブホールド部材34におけるハブ98の保持を解除する廃棄操作部68とを設けると共に、穿刺操作部84による穿刺作動前に廃棄操作部68の操作を阻止する誤操作防止機構を設けた。【選択図】図2