Electric caliper brake

An electric caliper brake including a carrier to which a pair of pad plates configured to move forward and backward are mounted, and a caliper housing which is slidably mounted to the carrier and is provided with a cylinder containing a piston configured to move linearly by a brake oil pressure, the electric caliper brake comprising:

• a spindle unit including a screw which penetrates a rear portion of the cylinder and is configured to rotate by receiving rotational force from an actuator, and a nut which is screw-engaged with the screw in the piston and configured to move forward and backward according to rotation of the screw while being restricted in rotation so as to pressurize the piston and release pressurization;
• a fixing element fixed to a rear inner peripheral surface of the piston;
• and
• an elastic element having one end supported by the nut and the other end supported by the fixing element, and configured to return the piston to an original position when braking is released,
• wherein when the piston moves by a brake oil pressure, the elastic element is compressed against the spindle unit which is kept stationary, and
• when braking is released, the elastic element returns the piston using elastic restoring force thereof.