Glow plug comprising: - a heating rod (11, 11') which extends longitudinally according to an axis, called the principal axis, and having an extremity, called the proximal extremity, which is equipped with an electrical connection with an electrical link (12, 98) for electrical power supply to the heating rod, - a plug body, forming a housing, called a receiving housing, receiving the heating rod, the latter having a distal portion which extends axially, projecting beyond the plug body, - a mounting device for mounting the heating rod in said receiving housing, this mounting device being arranged to permit axial translation movements of the heating rod relative to the plug body, - a load sensor (17, 67) which is interposed in a proximal zone between the heating rod and the plug body, in such a way that the axial translation movements of the heating rod relative to the plug body generate axial compression and/or traction stresses in said load sensor, - an electrical link, called the sensor link, which extends in the plug body between the load sensor and a proximal portion of the plug body, said sensor link including: ▪ at least one conductive line, called the signal line, which is connected to at least one sensitive element of the load sensor for transmitting the signals supplied by the load sensor, ▪ and an earth conductive layer which is interposed radially between said electrical power supply link (12, 98) of the heating rod and each signal line, characterized in that the sensor link extends along and entirely on one side of the principal axis of the heating rod, and in that the earth conductive layer is radially inside each signal line. - a heating rod (11, 11') which extends longitudinally according to an axis, called the principal axis, and having an extremity, called the proximal extremity, which is equipped with an electrical connection with an electrical link (12, 98) for electrical power supply to the heating rod, - a plug body, forming a housing, called a receiving housing, receiving the heating rod, the latter having a distal portion which extends axially, projecting beyond the plug body, - a mounting device for mounting the heating rod in said receiving housing, this mounting device being arranged to permit axial translation movements of the heating rod relative to the plug body, - a load sensor (17, 67) which is interposed in a proximal zone between the heating rod and the plug body, in such a way that the axial translation movements of the heating rod relative to the plug body generate axial compression and/or traction stresses in said load sensor, - an electrical link, called the sensor link, which extends in the plug body between the load sensor and a proximal portion of the plug body, said sensor link including: ▪ at least one conductive line, called the signal line, which is connected to at least one sensitive element of the load sensor for transmitting the signals supplied by the load sensor, ▪ and an earth conductive layer which is interposed radially between said electrical power supply link (12, 98) of the heating rod and each signal line, ▪ at least one conductive line, called the signal line, which is connected to at least one sensitive element of the load sensor for transmitting the signals supplied by the load sensor, ▪ and an earth conductive layer which is interposed radially between said electrical power supply link (12, 98) of the heating rod and each signal line,