Touch panel sensor and manufacturing method of touch panel sensor

A touch panel sensor comprising:

• a conductive base material including a base material and a sensor electrode disposed on the base material;
• and
• a protective film covering at least a part of the sensor electrode,
• wherein a surface hardness of the protective film on an opposite side to the conductive base material is 185 mN/mm2 or more, and
• a diameter X obtained by performing the following mandrel test is 3 mm or less,
• mandrel test:
• an operation of winding the touch panel sensor around a mandrel and returning the touch panel sensor to an original position is repeated 10 times, an operation of observing the protective film of the touch panel sensor with an optical microscope at a magnification of 10 times to confirm presence or absence of cracks in the protective film is repeated while reducing a diameter of the mandrel, and a diameter of the mandrel in which the protective film is cracked is defined as the diameter X.