Electric actuator

An electric actuator comprising:

• a motor having a motor shaft that extends in an axial direction;
• a deceleration mechanism that is connected to the motor shaft;
• a case in which the motor and the deceleration mechanism are accommodated;
• an output part to which rotation of the motor shaft is transmitted through the deceleration mechanism;
• a first rotation sensor that detects rotation of the output part;
• and
• a holding member that holds the first rotation sensor in the case,
• wherein the case comprises
• a first recess that is recessed from an inner surface of the case to one side in a first direction, and
• a support surface that faces the other side in the first direction and is disposed on the other side in the first direction relative to a bottom surface of the first recess,
• wherein the first rotation sensor comprises
• a sensor main body which comprises a sensor chip and is accommodated in the first recess, and
• a projection that protrudes in a second direction orthogonal to the first direction from the sensor main body,
• wherein the projection is supported on the support surface from one side in the first direction, and
• wherein the sensor main body is disposed on the other side in the first direction away from the bottom surface of the first recess.