The utility model provides a burner and a gas stove, the burner comprises an ejector and a valve body, the outlet end of the output
pipe of the valve body is used for installing a
nozzle matched with the air inlet end of the ejector, the ejector is provided with a first positioning part, the output
pipe is provided with a second positioning part corresponding to the first positioning part, and the valve body is arranged on the valve body. And the second positioning part is inserted and matched with the first positioning part. According to the utility model, the second positioning part on the output
pipe is inserted into the first positioning part on the ejector, so that the positioning effect between the
nozzle of the
combustor and the ejector can be improved, and particularly, the positioning effect between the
nozzle of the
combustor adopting an annular air inlet scheme and the ejector can be improved, and therefore, the positioning effect between the nozzle of the
combustor and the ejector can be improved. According to the combustor, the ejection effect of the ejector on primary air can be guaranteed, and meanwhile the assembling efficiency of the combustor adopting the annular air inlet scheme can be improved.