A method for manufacturing a contacting device, comprising the steps of - manufacturing a head unit by connecting to each other, by means of shrink fitting or press fitting, a second end of a plunger having a broadened portion at its first end, and a head element , and - manufacturing a contacting device comprising a tube element having a third end and a fourth end opposite the third end, receiving the broadened portion of the plunger at the third end, and keeping the broadened portion in its inner space by means of an inward-projecting flange portion arranged at the third end, and a resilient element being arranged in the inner space of the tube element , being supported against the end portion of the broadened portion and against the closed fourth end of the tube element , such that the manufacturing of the head unit is performed after the plunger is introduced into the tube element , wherein - before connecting the plunger and the head element to each other, the plunger is introduced into the inner space of a tube element through the fourth end, wherein the second end of the plunger projects out from the tube element in case the broadened portion is abutted against to the flange portion , - then, after connecting the plunger and the head element to each other, wherein the head element is connected to the second end of the plunger projecting out from the tube element , a resilient element is introduced to the broadened portion of the plunger through the fourth end of the tube element , and - the fourth end of the tube element is closed by means of a plug element , biasing the resilient element with the plug element . - manufacturing a head unit by connecting to each other, by means of shrink fitting or press fitting, a second end of a plunger having a broadened portion at its first end, and a head element , and - manufacturing a contacting device comprising a tube element having a third end and a fourth end opposite the third end, receiving the broadened portion of the plunger at the third end, and keeping the broadened portion in its inner space by means of an inward-projecting flange portion arranged at the third end, and a resilient element being arranged in the inner space of the tube element , being supported against the end portion of the broadened portion and against the closed fourth end of the tube element , such that the manufacturing of the head unit is performed after the plunger is introduced into the tube element , wherein - before connecting the plunger and the head element to each other, the plunger is introduced into the inner space of a tube element through the fourth end, wherein the second end of the plunger projects out from the tube element in case the broadened portion is abutted against to the flange portion , - then, after connecting the plunger and the head element to each other, wherein the head element is connected to the second end of the plunger projecting out from the tube element , a resilient element is introduced to the broadened portion of the plunger through the fourth end of the tube element , and - the fourth end of the tube element is closed by means of a plug element , biasing the resilient element with the plug element . - before connecting the plunger and the head element to each other, the plunger is introduced into the inner space of a tube element through the fourth end, wherein the second end of the plunger projects out from the tube element in case the broadened portion is abutted against to the flange portion , - then, after connecting the plunger and the head element to each other, wherein the head element is connected to the second end of the plunger projecting out from the tube element , a resilient element is introduced to the broadened portion of the plunger through the fourth end of the tube element , and - the fourth end of the tube element is closed by means of a plug element , biasing the resilient element with the plug element . <EOS>