The aim of the invention is to be able to arrange or secure an elastic nozzle in a device, especially a casting machine, using simple design measures while allowing the nozzle to be quickly replaced in the device using simple mounting steps. Said aim is achieved by a connection piece (1) which is particularly suitable for securing an elastic nozzle (3) in a casting machine. The connection piece (1) preferably has a hollow cylindrical shape and includes a securing mechanism (4), especially a thread, at one end. A clamping unit (2) is connected to the connection piece (1). The connection piece (1) and/or the clamping unit (2) has/have a receptacle for the nozzle (3), and the nozzle (3) is connected to the connection piece (1).