PROBLEM TO BE SOLVED: To detect an angle between first and second members rotatably connected to each other.SOLUTION: An angle detector includes: a detection surface which is provided in a first member a distance measurement unit which is provided in a second member rotatable together with the first member and a control unit which makes the distance measurement unit measure a distance to the detection surface, changed by rotating the first and second members, and which converts the distance to the detection surface, measured by the distance measurement unit, to an angle to output it.COPYRIGHT: (C)2014,JPO&INPIT【課題】回動可能に接続された第1部材と第2部材の角度を検出する。【解決手段】本発明の角度検出装置は、第1の部材に設けられた検出面と、第1の部材と回動可能な第2の部材に設けられた距離計測部と、第1の部材と第2の部材が回動することで変化する検出面までの距離を距離計測部で計測し、距離計測部が計測した検出面までの距離を角度に換算して出力する制御部と、を備えたことを特徴とする。【選択図】図3