ELECTRIC ACTUATOR

To provide an electric actuator having a structure that can prevent a decrease in the accuracy of detecting an axial position of a movable element.SOLUTION: An electric actuator 100 comprises: a movable element 70 having a shaft 71 and movable in an axial direction; a coil 40 surrounding a core body 72; a case accommodating the core body and the coil therein; a first magnet 51 accommodated inside the case, and located radially inside the coil or radially outside the coil; a second magnet 52 fixed to an end on one side in the axial direction of the shaft; a magnetic sensor 81 arranged opposite to one side in the axial direction of the second magnet with a gap therebetween; and a shield member made of a magnetic substance and located on one side in the axial direction of the case. The shield member has a first opening, a first peripheral wall part 91b, an outer wall part 94, and a first connection part 91a extending radially outward from the first peripheral wall part and connecting the first peripheral wall part and the outer wall part to each other.SELECTED DRAWING: Figure 6 【課題】可動子の軸方向位置の検出精度が低下することを抑制できる構造を有する電動アクチュエータを提供する。【解決手段】電動アクチュエータ１００は、シャフト７１を有し、軸方向に移動可能な可動子７０と、コア体７２を囲むコイル４０と、コア体およびコイルを内部に収容するケースと、ケースの内部に収容され、コイルの径方向内側またはコイルの径方向外側に位置する第１マグネット５１と、シャフトの軸方向一方側の端部に固定された第２マグネット５２と、第２マグネットの軸方向一方側に隙間を介して対向して配置された磁気センサ８１と、ケースの軸方向一方側に位置する磁性体製の遮蔽部材と、を備える。遮蔽部材は、第１開口部、第１周壁部９１ｂと、外壁部９４と、第１周壁部から径方向外側に延びて、第１周壁部と外壁部とを繋ぐ第１接続部９１ａと、を有する。【選択図】図６