Prefilled syringe outer cylinder for (2), the needle at both ends (61a, 61b) a hollow needle (61) having a piercing member body fitted with hollow needles (61) (60) piercing member and a (6) There are those that can be mounted. Prefilled syringe outer cylinder for (2), the needle portion of the opening tip portion having (48) an outer tube body with a (41) (4) seals the opening (48), a hollow needle (61) ( 61b) is housed a sealing member (10) capable of piercing, and comprises an outer cylindrical sealing member attached to the distal end (41) of the outer cylinder body (4) (5). Outer tubular sealing member (5) is penetrating member mounting portion capable of mounting the piercing member (6) and (50), withdrawal and times of the outer cylindrical sealing member attached to the outer cylinder body (4) (5) and a regulating portion for regulating the movement. Further, the outer tube sealing member (5) is broken operating portion projecting from the piercing member mounting portion (50) and (56), piercing member mounting portion (50) and the breaking operation unit (56) break formed between comprising enabling unit (57), breakable portion (57) broken by separating the breaking operation unit (56), which piercing member (6) can be attached to the piercing member mounting portion (50) It has become.プレフィルドシリンジ用外筒(2)は、両端に針部(61a,61b)を有する中空針(61)と、中空針(61)を装着した穿刺部材本体(60)とを備える穿刺部材(6)が装着可能なものである。プレフィルドシリンジ用外筒(2)は、開口(48)を有する先端部(41)を備えた外筒本体(4)と、開口(48)を封止し、中空針(61)の針部(61b)が刺通可能なシール部材(10)を収納し、かつ、外筒本体(4)の先端部(41)に装着された外筒封止部材(5)とを備える。外筒封止部材(5)は、穿刺部材(6)を装着可能な穿刺部材装着部(50)と、外筒本体(4)に装着された外筒封止部材(5)の離脱および回動を規制する規制部とを有する。さらに、外筒封止部材(5)は、穿刺部材装着部(50)より突出する破断操作部(56)と、穿刺部材装着部(50)と破断操作部(56)間に形成された破断可能部(57)とを備え、破断可能部(57)を破断し、破断操作部(56)を分離することにより、穿刺部材装着部(50)に穿刺部材(6)が装着可能となるものとなっている。
