A cable includes a plurality of tubes formed integrally and continuously in the vertical direction. The cable has one end fixed to a first cable-connecting section disposed at one end of a body of an electric actuator. The cable has the other end connected to a second cable-connecting section connected to a slider which is displaceable along the axis by a rotary driving source. The cable is installed substantially horizontally with respect to the body. The dimension in height is large, and the dimension in thickness is small.