Electric actuator

An electric actuator comprising:

• a motor part configured to be driven upon receiving a supply of power;
• a motion conversion mechanism part configured to convert rotary motion of the motor part into linear motion;
• a housing accommodating the motor part and the motion conversion mechanism part;
• and
• a terminal part,
• wherein the motion conversion mechanism part comprises a ball screw device, the ball screw device comprising:
• a ball screw shaft;
• and
• a ball screw nut that is rotatably fitted to an outer periphery of the ball screw shaft through intermediation of a plurality of balls,
• wherein the ball screw shaft advances and retreats in an axial direction along with rotation of the ball screw nut,
• wherein the ball screw shaft has a hollow shape having a hole portion extending in the axial direction,
• wherein a stroke detection sensor configured to detect an amount of displacement of the ball screw shaft in the axial direction is arranged in the hole portion,
• wherein the housing comprises a plurality of members coupled in the axial direction,
• wherein the terminal part is configured to hold a power supply circuit and the stroke detection sensor, the power supply circuit being configured to supply the power to the motor part,
• wherein the terminal part integrally comprises a tubular portion that forms a part of the housing, and
• wherein the tubular portion is sandwiched by other members of the plurality of members forming the housing from both sides in the axial direction.