To provide a load detector which can prevent erroneous detection of an output voltage of a load detecting sensor.SOLUTION: A load detector 66 includes a body 61 and a cover part 62 that opens and closes the body 61. When the cover part 62 is closed, the load detector 66 detects the load by pressure from a measured object part positioned between the body 61 and the cover part 62. The load detector includes: a load part 71 that can be moved in an axial direction by pressure from the measured object part； a load detecting sensor 665 that detects a load from the load part 71 positioned to face the tip of the load part 71； a contact part 72 provided in contact with an outer peripheral face of the load part 71 so as not to inhibit movement of the load part 71 in the axial direction； and a connecting part 73 for electrically connecting the contact part 72 and an earth part 610.SELECTED DRAWING: Figure 8【課題】荷重検出センサの出力電圧の誤検知を防止できる荷重検出器を提供すること。【解決手段】荷重検出器６６は、本体６１と、本体６１を開閉する蓋部６２と、を備え、蓋部６２の閉鎖時に、本体６１と蓋部６２との間に配置される測定対象部からの圧力による荷重を検出する荷重検出器６６であって、測定対象部からの圧力により軸方向へ進退可能な荷重部７１と、荷重部７１の先端に対向して配置され荷重部７１からの荷重を検出する荷重検出センサ６６５と、荷重部７１の軸方向への移動を阻害しないように荷重部７１の外周面に接して配置される接触部７２と、接触部７２とアース部６１０とを電気的に接続する連結部７３と、を備える。【選択図】図８
