An objective of the present invention is to provide a tubular sensor capable of carrying out high-precision constituent detection and that is easy to manufacture, as well as a constituent measuring device and a method of manufacturing said tubular sensor. Accordingly, the present invention configures a tubular sensor comprising: a tubular body having a hollow shaft running the length thereof in the longitudinal direction an insulation layer formed on the inner wall face of the tubular body and a plurality of electrodes formed on the insulation layer in the longitudinal direction of the tubular body, and running continuously from end of the tubular body to the other end thereof. The present invention further configures a constituent measuring device which employs the tubular sensor. The tubular sensor is further manufactured via the steps of: forming an insulation layer on a thin metal sheet forming a plurality of electrodes on the insulating layer in stripes cutting the thin metal sheet whereon the insulating layer and the electrodes are formed and forming a plate-shaped body which has a tubular body development shape having a hollow shaft running the length thereof in the longitudinal direction in a state wherein the thin metal sheet and the plate-shaped body are partially connected and press working the plate shaped body to form a tubular body.La présente invention concerne un capteur tubulaire capable deffectuer une détection de constituant à haute précision et qui est facile à fabriquer, ainsi quun dispositif de mesure de constituant et un procédé de fabrication dudit capteur tubulaire. En conséquence, la présente invention configure un capteur tubulaire comprenant : un corps tubulaire ayant un axe creux sétendant sur toute sa longueur dans la direction longitudinale une couche disolation formée sur la face de paroi interne du corps tubulaire et une pluralité délectrodes formées sur la couche disolation dans la direction longitudinale du corps tubulaire, et sé
