The utility model discloses a disposable noninvasive electroencephalogram sensor, and belongs to the technical field of electroencephalogram sensors. Comprising a sensor body and an
insertion piece connector connected with the sensor body, the
insertion piece connector comprises a connecting plate, a
chip and an adjusting
assembly, a through groove is formed in the end, away from the sensor body, of the connecting plate, the adjusting
assembly is arranged in the through groove, the
chip is fixedly arranged on the adjusting
assembly, and the adjusting assembly is used for adjusting the position of the
chip. In the process of inserting the
insertion piece connector into the wire interface of the
anesthesia depth detection equipment, the adjusting assembly is extruded and drives the chip to move towards the upper opening of the through groove, so that the chip is always subjected to an upward supporting force, and good contact between the chip and the
anesthesia depth detection equipment is ensured; the problem that data detected by an
electrode slice cannot be read due to poor contact between the
electrode slice and an insertion port of
anesthesia depth detection equipment in the
actual use process of an existing
electrode insertion slice with a fixed size is solved.