TAMPER-PROOF CAP

To prevent tampered un-sealing and improve operability for those who are authorized.SOLUTION: Between an outer cap 11 and an operation part 12 are provided first locking bodies 55, 67 with which the operation part 12 is movable from the tightened engagement position toward the loosening engagement position together with pushing operation of the operation part 12 to an inner cap 10 while suppressing movement of the operating part 12 located at the tightening engagement position to the loosening engagement position and second locking bodies 55, 68 with which the operation part 12 is movable from the retracted position to the tightening engagement position together with pushing operation of the operation part 12 to the inner cap 10 while suppressing the movement of the operation part 12 located at the retracted position to the tightening engagement position.SELECTED DRAWING: Figure 1 【課題】非対象者による開封を防止しつつ、対象者による操作性の向上を図る。【解決手段】外キャップ１１と操作部１２との間に、締め込み係合位置に位置する操作部１２の緩み係合位置への移動を抑止するとともに、内キャップ１０に対する操作部１２の押し込み操作に伴い、操作部１２が締め込み係合位置から緩み係合位置に向けて移動可能な第１係止体５５、６７と、退避位置に位置する操作部１２の締め込み係合位置への移動を抑止するとともに、内キャップ１０に対する操作部１２の押し込み操作に伴い、操作部１２が退避位置から締め込み係合位置に移動可能な第２係止体５５、６８と、が配設されている。【選択図】図１