To prevent contact between peripheral components of a connection device and a harness when the connection device with which the harness having an excess length portion is connected is attached to an attachment position.SOLUTION: A harness clip 10 is provided with: a locking clip 15 which is fixed to a support member 13; and a planar extension part 14. The extension part 14 is formed in a shape of a plate crossing a cross direction to substantially linearly extend in a vehicle width direction. The locking clip 15 is provided on a front surface on a side of a right end 14a of the extension part 14 to project forward. The extension part 14 extends leftward from a side of the locking clip 15, and its left end 14b extends to the left side than a position of a connector connection part 17 in an attached state. A locking ring 16 which locks a harness 12 is fixedly provided near the left side of the locking clip 15 of a rear surface of the extension part 14.SELECTED DRAWING: Figure 2
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