The invention relates to a sealed container (1) comprising a container body (2) having a through-hole (8) that is delimited by a flange and is closed by a removable door (7) mounted on the flange, an annular seal (13) located between the flange and the door (7), the flange, the door (7) and the seal forming a sealed connection device that can be connected to a complementary connection device on a sterile enclosure by means of bayonet connection means in order to allow sterile communication between the sealed container and the sterile enclosure, characterized in that the seal (13) comprises, on its inner peripheral circumference, an annular attachment bead (130) for attaching the door (7) to the flange inserted into a notch (70) on the door (7).