To obviate the need of leading a wire around and to comfortably use a connector by reducing the restriction in the fixing direction of the connector in relation to the fixing structure of the connector.

A connector 10 and a panel 20 have slide parts 13 and 23 for slidably stacking a pair of flat extension parts 15 and 25, a cross-sectionally rhombus-shaped projection part 26 for connecting a supporting wall 24 is formed on the panel 20, an engaging claw 16 tilting in a slide direction and a stopper 17 for closing the end of the flat extension part 15 becoming the tip of the engaging claw 16 are formed in the connector 10. Thereby the tip of the engaging claw 15 is hit and stopped by the projection 26 so that its slide in the returning direction is restricted, and the flat extension part 25 is hit and stopped by the stopper 17 so that its further slide is restricted when the engaging claw 16 of the connector 10 overrides the projection part 26 by rocking and elastical deformation.