Heat resistor type flow rate measuring device

The auxiliary passage sidewall 15 of the air temperature detecting element 12 are close to each other, in the vicinity of the air temperature detecting element 12, the auxiliary passage wall hole 9 is provided. Further, the auxiliary passage sidewall 15 which the temperature sensitive resistor 13 is in close proximity, in the vicinity of the temperature sensitive resistor 13, the auxiliary passage wall hole 10 is provided. Further, the auxiliary passage sidewall 16 where the heating resistors 14 are close to the vicinity of the heating resistor 14, the auxiliary passage wall hole 11 is provided.