PROBLEM TO BE SOLVED: To efficiently stimulate only a C fiber through electrical stimulation.SOLUTION: A pain sensory nerve stimulation apparatus includes an electrode portion comprising a first electrode 31, the tip end of which is adapted to be slightly inserted into a skin, and at least one or more second electrodes 2 which are disposed in a circumference of the first electrode, without being electrically conductive, and which is made to come into contact with skin and a stimulation signal supplying means 11 which supplies a stimulation signal between the first electrode and the second electrode, with the stimulation signal being composed of a combination of a first waveform signal which is convex in a negative side in the first electrode and a second waveform signal which is convex in a positive side in the first electrode.COPYRIGHT: (C)2011,JPO&INPIT【課題】電気的刺激によってC線維のみを効率良く刺激する。【解決手段】先端を皮膚内に僅かに刺して用いる第1電極31と、前記第1電極の周囲に導通せずに配置され、皮膚に接触させて用いる少なくとも一つ以上の第2電極2とから構成される電極部と、記第1電極と前記第2電極間に、前記第1電極においてマイナス側に凸となる第1の波形信号と、前記第1電極においてプラス側に凸となる第2の波形信号との組み合わせにより成る刺激信号を供給する刺激信号供給手段11とを具備する。【選択図】図1
