As for this invention, the opening for the stab the tubed computer case which it possesses (5) (1) and this computer case (1) the opening for the stab inside (5) the needle support which is provided on side (9) with, this needle support (9) the opening for the stab (5) the elastic body which is made to move on side (15) with, the elastic body (15) with on bottom side the opening for the stab (5) the needle support which could be made to move to side (9) the computer case (1) the elastic body which is pulled back to the top side inside (25) with, to have, the computer case (1) the needle support inside (9) the needle attaching part(13) compared to in the upper part, as the time driving axle which is locked in the computer case (1) (21) focusing on the time dynamic body which time motion is done (20) it provides, the time driving axle (21) puts and the time dynamic body (20) the needle support (9) the concatenated section (14) concatenates on the inside one side both sides, the elastic body (25) it concatenated on other side.本発明は、下端側に穿刺用開口部(5)を有する筒状の本体ケース(1)と、この本体ケース(1)内の穿刺用開口部(5)側に設けた針保持体(9)と、この針保持体(9)を穿刺用開口部(5)側に移動させる弾性体(15)と、弾性体(15)によって穿刺用開口部(5)側に移動させられた針保持体(9)を本体ケース(1)内の上端側に引き戻す弾性体(25)と、を備え、本体ケース(1)内の針保持体(9)の針保持部(13)よりも上方において、本体ケース(1)に固定された回動軸(21)を中心に回動する回動体(20)を設け、回動軸(21)を挟んで回動体(20)の両側のうち一側に針保持体(9)の連結部(14)を連結するとともに、他側に弾性体(25)を連結した。
