A position indicator comprising: a pen-like housing ; a first electrode and a second electrode that are arranged at one end of the housing in an axial center direction thereof, the second electrode being arranged to encircle the first electrode in such a manner as to let the first electrode be partially exposed in the axial center direction of the housing ; and a signal transmission control circuit that supplies at least the first electrode with a signal such as to interact capacitively with a sensor of a position detection apparatus, wherein the signal transmission control circuit is configured to cause the second electrode selectively to output a signal that cancels out the signal output from the first electrode , wherein the position indicator is characterized in that the signal transmission control circuit includes an oscillation circuit configured to generate the signal to be supplied to the first electrode , wherein the position indicator is configured such that when a tip part of the first electrode is in contact with a surface, the signal from the oscillation circuit is supplied to the first electrode and the second electrode outputs the signal opposite in phase to the signal from the first electrode , and when the tip part of the first electrode is not in contact with a surface, the signal from the oscillation circuit is supplied to the first electrode and the second electrode outputs a signal in phase with the signal from the first electrode . a pen-like housing ; a first electrode and a second electrode that are arranged at one end of the housing in an axial center direction thereof, the second electrode being arranged to encircle the first electrode in such a manner as to let the first electrode be partially exposed in the axial center direction of the housing ; and a signal transmission control circuit that supplies at least the first electrode with a signal such as to interact capacitively with a sensor of a position detection apparatus, wherein the signal transmission control circuit is configured to cause the second electrode selectively to output a signal that cancels out the signal output from the first electrode , wherein the position indicator is characterized in that the signal transmission control circuit includes an oscillation circuit configured to generate the signal to be supplied to the first electrode , wherein the position indicator is configured such that when a tip part of the first electrode is in contact with a surface, the signal from the oscillation circuit is supplied to the first electrode and the second electrode outputs the signal opposite in phase to the signal from the first electrode , and when the tip part of the first electrode is not in contact with a surface, the signal from the oscillation circuit is supplied to the first electrode and the second electrode outputs a signal in phase with the signal from the first electrode . wherein the position indicator is characterized in that the signal transmission control circuit includes an oscillation circuit configured to generate the signal to be supplied to the first electrode , wherein the position indicator is configured such that when a tip part of the first electrode is in contact with a surface, the signal from the oscillation circuit is supplied to the first electrode and the second electrode outputs the signal opposite in phase to the signal from the first electrode , and when the tip part of the first electrode is not in contact with a surface, the signal from the oscillation circuit is supplied to the first electrode and the second electrode outputs a signal in phase with the signal from the first electrode . <EOS>