Electric actuator

An electric actuator comprising:

• a body;
• a driving section driven rotatably under supply of an electric current thereto;
• a drive force transmission mechanism connected to the driving section for transmitting a drive force from the driving section;
• a displacement mechanism disposed on the body and including a screw shaft, which is rotatably displaced by the drive force transmitted through the drive force transmission mechanism, and a displacement member, which is screw-engaged with the screw shaft and displaced along an axial direction of the body;
• a connecting member coupled to one end of the screw shaft and connected to the drive force transmission mechanism;
• a support mechanism for supporting the screw shaft in a radial direction;
• and
• a rotation regulating mechanism disposed on an outer circumferential surface of the displacement member, which is engaged in a groove of the body and regulates rotational displacement of the displacement member,
• wherein the support mechanism is disposed on another end of the screw shaft.