[Problem] An object of the present invention is to provide an ampoule which is hard to crack on a barrel while increasing cleavability required for a hermetical container end. [Means for Solving Problem] The above object is solved by an ampoule (20) provided with a front edge portion (1), a main body (2), a connection (3), and a joint (4), wherein a hermetical container end (10) which includes the front edge portion (1), the joint (4) and the connection (3) is formed separately from the main body (2), and the joint (4) breaks when a force is applied from a lateral direction with respect to the central axis (5), so that a head portion of the connection (3) which is circular truncated cone shaped is exposed and the space portion (13) of the connection (3) becomes an open end.
