PROBLEM TO BE SOLVED: To realize a puncture device and a drug solution administration device which are capable of being much easily downsized as compared with conventional ones.SOLUTION: A drug solution administration device 200 is provided with a pulling-back mechanism (an inner needle slide part 291 and a first coil spring 293) inside a puncture mechanism (a catheter slide part 290 and a second coil spring 296). The puncture mechanism 280 has a double structure, so that the puncture mechanism can be easily downsized as compared with conventional puncture mechanisms, etc. in which a puncture mechanism and a pull-back mechanism are juxtaposed to each other, for example.COPYRIGHT: (C)2015,JPO&INPIT【課題】従来と比して一段と容易に小型化できる穿刺装置及び薬液投与装置を実現する。【解決手段】薬液投与装置200は、穿刺用の機構(カテーテルスライド部290及び第2のコイルバネ296)の内側に、引き戻し用の機構(内針スライド部291及び第1のコイルバネ293)を設けるようにして、穿刺機構280を二重構造としたことにより、例えば、穿刺用の機構と引き戻し用の機構とを並設するような従来の穿刺機構などと比較して穿刺機構を容易に小型化することができる。【選択図】図12
