A position pointer (1B, 1C) for use with a position detection sensor (502, 702) which comprises a sensor section including a plurality of transmission conductors and a plurality of reception conductors and is configured to detect a position of the position pointer (1B, 1C), comprising: a first electrode configured to capacitively receive an AC signal from said position detection sensor (502, 702); a transmission signal production circuit configured to produce a signal, based on which said position detection sensor detects the position; signal; a second electrode different from said first electrode and configured to receive the signal produced by said transmission signal production circuit; a signal detection circuit configured to detect whether or not the AC signal from said position detection sensor (502, 702) is received through said first electrode; a transmission controlling circuit configured to control transmission of the signal from said transmission signal production circuit through said second electrode in response to an output from said signal detection circuit, a power storage circuit configured to drive said position pointer; wherein said first and second electrodes are disposed at the same end portion of said position pointer (1B, 1C), wherein the signal based on which said position sensor detects a position is transmitted from said second electrode in response to the detection of the AC signal received from said position detection sensor (502, 702) through said first electrode; characterized in that the power storage circuit is configured to drive said position pointer with power supplied from the outside; and wherein said transmission controlling circuit controls supply of power from said storage circuit to said transmission signal production circuit, to thereby control transmission of the signal from said transmission signal production circuit through said second electrode; the position pointer further comprises a stabilized power supply circuit generating a stabilized power supply voltage to be supplied to said transmission signal production circuit. a first electrode configured to capacitively receive an AC signal from said position detection sensor (502, 702); a transmission signal production circuit configured to produce a signal, based on which said position detection sensor detects the position; signal; a second electrode different from said first electrode and configured to receive the signal produced by said transmission signal production circuit; a signal detection circuit configured to detect whether or not the AC signal from said position detection sensor (502, 702) is received through said first electrode; a transmission controlling circuit configured to control transmission of the signal from said transmission signal production circuit through said second electrode in response to an output from said signal detection circuit, a power storage circuit configured to drive said position pointer; wherein said first and second electrodes are disposed at the same end portion of said position pointer (1B, 1C), wherein the signal based on which said position sensor detects a position is transmitted from said second electrode in response to the detection of the AC signal received from said position detection sensor (502, 702) through said first electrode; characterized in that the power storage circuit is configured to drive said position pointer with power supplied from the outside; and wherein said transmission controlling circuit controls supply of power from said storage circuit to said transmission signal production circuit, to thereby control transmission of the signal from said transmission signal production circuit through said second electrode; the position pointer further comprises a stabilized power supply circuit generating a stabilized power supply voltage to be supplied to said transmission signal production circuit.