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