Abstract: A spring untangling apparatus for separating tangled coil springs comprises a box having spring inlet and outlet apertures at opposed walls thereof. A spring inlet duct is led to the spring inlet aperture. A vibration device is provided for vibrating the spring inlet duct to cause the tangled coil springs in the inlet duct to move toward the spring inlet aperture. The box is configured so that the tangled coil springs are placed in order so that clusters of the tangled coil springs are led into the box one cluster after another. An air jet nozzle is arranged for forcing the tangled coil springs into the box through the spring inlet aperture with an aid of compressed air, and another air jet nozzle is arranged for blowing up the tangled coil springs in the box to violently hit the same against inner walls of the box thereby untangling the same.