Electric actuator

An electric actuator comprising:

• a differential, the differential including:
• a drive rotating body rotatable about a rotation axis;
• a planetary rotating body that is rotatable and is revolvable about the rotation axis;
• and a driven rotating body rotatable about the rotation axis, wherein the planetary rotating body is engaged with each of the drive rotating body and the driven rotating body, a first speed reducer is constituted between the planetary rotating body and the drive rotating body, a second speed reducer is constituted between the planetary rotating body and the driven rotating body, and a reduction ratio of the first speed reducer and a reduction ratio of the second speed reducer are different from each other;
• and
• an electric motor that drives the planetary rotating body, wherein
• the drive rotating body is driven by a driving force from outside,
• the driven rotating body is provided with a first output member,
• the drive rotating body is provided with a second output member, and
• in a state where the electric motor is not energized, rotation of the drive rotating body is transmitted to the driven rotating body via the planetary rotating body, and the driven rotating body rotates integrally with the drive rotating body while maintaining a same rotation phase with the drive rotating body.