A pressure-sensor-integrated glow plug used by being inserted into the inside of a combustion chamber of an internal combustion engine, the pressure-sensor-integrated glow plug comprising: a housing; a rod-shaped ceramic heater element having a distal end thereof projecting from the housing and held on the housing; and a pressure sensor, wherein the ceramic heater element is held on the housing by a flexible member and has a position thereof displaceable with respect to the housing, and the pressure sensor receives a pressure in the combustion chamber in response to a displacement of the ceramic heater element, wherein the ceramic heater element includes: a ceramic heater; a metal-made outer sleeve holding the ceramic heater on one end side thereof and having the other end side thereof inserted into and fixed to an inner hole of the housing; and a conductor portion electrically connected to one electrode of the ceramic heater and led out to the other end side of the metal-made outer sleeve, and inside the metal-made outer sleeve, said metal-made outer sleeve is sealed with respect to the combustion chamber, and the seal is provided on a more rear end side than at least the flexible member in an axial direction of the ceramic heater element, wherein pressure in the combustion chamber is transmitted to the pressure sensor through a force transmission sleeve; characterized in that the pressure sensor is fixed to a fixing cylinder member, which is connected to the housing, the flexible member is metal-made, and the force transmission sleeve holds the metal-made outer sleeve. a housing; a rod-shaped ceramic heater element having a distal end thereof projecting from the housing and held on the housing; and a pressure sensor, wherein the ceramic heater element is held on the housing by a flexible member and has a position thereof displaceable with respect to the housing, and the pressure sensor receives a pressure in the combustion chamber in response to a displacement of the ceramic heater element, wherein the ceramic heater element includes: a ceramic heater; a metal-made outer sleeve holding the ceramic heater on one end side thereof and having the other end side thereof inserted into and fixed to an inner hole of the housing; and a conductor portion electrically connected to one electrode of the ceramic heater and led out to the other end side of the metal-made outer sleeve, a ceramic heater; a metal-made outer sleeve holding the ceramic heater on one end side thereof and having the other end side thereof inserted into and fixed to an inner hole of the housing; and a conductor portion electrically connected to one electrode of the ceramic heater and led out to the other end side of the metal-made outer sleeve, and inside the metal-made outer sleeve, said metal-made outer sleeve is sealed with respect to the combustion chamber, and the seal is provided on a more rear end side than at least the flexible member in an axial direction of the ceramic heater element, wherein pressure in the combustion chamber is transmitted to the pressure sensor through a force transmission sleeve; characterized in that the pressure sensor is fixed to a fixing cylinder member, which is connected to the housing, the flexible member is metal-made, and the force transmission sleeve holds the metal-made outer sleeve.