The device for spraying a release agent in a casting machine, comprises one or more spray nozzles (1) and means designed for controlled discharge of release agent from the spray nozzle and comprising a dosing unit (3) assigned to at least one spray nozzle and priorly setting the release agent discharged by at least one nozzle in each spraying, wherein the release agent is separately supplied by arelease agent supply device and discharged in subsequent spraying. For example, the device can be used for metal die-casting machine.