CAPACITANCE SENSOR

To provide a capacitance sensor which is less susceptible to an influence of external radio noise.SOLUTION: In a self-capacitance capacitive sensor that detects proximity of a human body to a sensor electrode 22e on the basis of a determination voltage signal according to capacitance of a flat sensor electrode 22e to which an electrode connection line EW is connected, the sensor electrode 22e includes: a rectangular peripheral electrode 22e1; and a tongue-shaped inner electrode 22e2 connected to an inner periphery on one short side of the peripheral electrode and extending in the other short side. The electrode connection line EW is connected to one short side of the peripheral electrode 22e1.SELECTED DRAWING: Figure 2 【課題】 外来電波ノイズの影響を受けにくい静電容量センサを提供する。【解決手段】 電極接続線ＥＷが接続された平板状のセンサ電極２２ｅの容量に応じた判定電圧信号に基づいてセンサ電極２２ｅへの人体の近接を検出する自己容量方式の静電容量センサにおいて、センサ電極２２ｅは、長方形状の周囲電極２２ｅ１と、周囲電極の一方の短辺側の内周部に接続されて他方の短辺側に延びる舌片状の内側電極２２ｅ２を有し、電極接続線ＥＷは、周囲電極２２ｅ１の一方の短辺側に接続されている。【選択図】 図２