In a holder and a structure for organizing excess length by winding cables
and the like, an excess length organizing holder comprises a baseboard
which has a rotation axis vertical to a fixed plane, and a spool which
has a flange whose edge is provided with two incisions and a winding
portion. The spool is rotated around the rotation axis in a state where a
cable is folded by way of the winding portion and the two incisions,
thereby winding the cable twofold around the winding portion. Also, an
excess length organizing structure comprises a door detachable from a
box-shaped rack, a mounting hardware connecting the door to the rack and
pivoting on one side so as to make the door openable and closable, and at
least one excess length organizing holder mentioned above whose baseboard
is attached on a surface of the door when the door is attached to the
mounting hardware.