Physical quantity measurement device

A physical quantity measurement device configured to measure a physical quantity of a fluid, the physical quantity measurement device comprising:

• a measurement flow path that is configured to cause fluid to flow therethrough;
• a physical quantity sensor that is provided in a measurement flow path and configured to detect a physical quantity of the fluid;
• and
• a sensor support portion that supports the physical quantity sensor, wherein
• the physical quantity sensor includes
• a sensor recess portion, which is a recess portion provided on a sensor back surface, which is one surface of the physical quantity sensor, and
• a membrane portion, which forms a sensor recess bottom surface, which is a bottom surface of the sensor recess portion, the membrane portion being provided with a detection element configured to detect a physical quantity of the fluid, and
• the sensor support portion includes
• a back support portion, which extends along the sensor back surface and is provided to cover a sensor recess opening, which is an opening of the sensor recess portion,
• a support recess portion, which is a recess portion provided on a support back surface, which is a surface of the back support portion on a side opposite from the physical quantity sensor,
• a support hole, which extends from a support recess bottom portion, which is a bottom surface of the support recess portion, toward the sensor recess portion, the support hole penetrating the back support portion and communicating with the sensor recess opening, and
• a support recess inner wall surface, which is included in an inner surface of the support recess portion together with the support recess bottom portion, wherein
• the support recess inner wall surface extends from the support recess bottom portion toward a side opposite from the physical quantity sensor and is inclined with respect to a center line of the support hole so as to face a side opposite from the physical quantity sensor.