A continuous casting machine comprises a plurality of mould blocks (1) connected to form two endless tracks (2) which cooperate to define a mould cavity and a tundish (13) which supplies melt through a tundish nozzle (20) into one end of the mould cavity into which the tundish nozzle extends. A hydraulic cylinder (27) is arranged to adjust the angle of inclination of the tundish nozzle (21). Position sensors (29, 29′) positioned adjacent the said one end of the mould cavity are arranged to produce signals representative of the distance (L, L′) of the mould blocks (1) of each endless track. Control means (32) are responsive to the signals and arranged to supply a command signal to the cylinder (27) to cause it to adjust the angle of inclination of the tundish nozzle (21) to maintain the gaps between the tundish nozzle and the endless track substantially at predetermined values.