To provide a vapor jet nozzle which can heat a liquid food to a uniform temperature.

The vapor jet nozzle 40 unerringly distributes a vapor 34 jet from vapor jet holes 43 existing in hole forming lines (i) to (iv) provided to nearly equally divide a space D1 not only to the liquid food 33 stored in the upper layer area of a vessel body 31 but also to the liquid food 33 stored in the lower layer area of the vessel body 31, and can heat the liquid food 33 to a uniform temperature.