A position indicator used for inputting an indicated position on a tablet based on capacitive coupling with the tablet, the position indicator comprising: a signal generator (TR1, TR2, TR3) configured to generate an alternating-current signal; a plurality of electrodes (40, 41, 42) that are disposed at a position indicating part of the position indicator and configured to transmit the alternating-current signal to the tablet; a switch circuit configured to supply the alternating-current signal to only a selected one of the plurality of electrodes (40, 41, 42) based on a predetermined electrode-selection pattern; and a pattern information transmitter (40, 41, 42, 17) configured to transmit, to the tablet, pattern information indicating a set predetermined pattern when the pattern is switched by the switch circuit, wherein a first electrode and a second electrode are disposed at the position indicating part as the plurality of electrodes, the switch circuit alternately selects the first and second electrodes (40, 41) and supplies the alternating-current signal to the selected one of the electrodes, and the pattern information transmitter transmits first pattern information to the tablet when the first electrode is selected by the switch circuit, and transmits second pattern information to the tablet when the second electrode is selected by the switch circuit, wherein the plurality of electrodes (40, 41, 42) are arranged on a surface perpendicular to a pen axis direction, wherein the position indicating part has a chassis to enclose a core body, and the plurality of electrodes (40, 41, 42) are provided at a tip part of the chassis, wherein the position indicator is configured to obtain writing pressure applied to the core body and writing pressure data is transmitted from one of the plurality of electrodes (40, 41, 42). a signal generator (TR1, TR2, TR3) configured to generate an alternating-current signal; a plurality of electrodes (40, 41, 42) that are disposed at a position indicating part of the position indicator and configured to transmit the alternating-current signal to the tablet; a switch circuit configured to supply the alternating-current signal to only a selected one of the plurality of electrodes (40, 41, 42) based on a predetermined electrode-selection pattern; and a pattern information transmitter (40, 41, 42, 17) configured to transmit, to the tablet, pattern information indicating a set predetermined pattern when the pattern is switched by the switch circuit, wherein a first electrode and a second electrode are disposed at the position indicating part as the plurality of electrodes, the switch circuit alternately selects the first and second electrodes (40, 41) and supplies the alternating-current signal to the selected one of the electrodes, and the pattern information transmitter transmits first pattern information to the tablet when the first electrode is selected by the switch circuit, and transmits second pattern information to the tablet when the second electrode is selected by the switch circuit, wherein the plurality of electrodes (40, 41, 42) are arranged on a surface perpendicular to a pen axis direction, wherein the position indicating part has a chassis to enclose a core body, and the plurality of electrodes (40, 41, 42) are provided at a tip part of the chassis, wherein the position indicator is configured to obtain writing pressure applied to the core body and writing pressure data is transmitted from one of the plurality of electrodes (40, 41, 42).