To definitely fix panels for a long period of time without pull-out when fixing an exterior panel for a sound insulation wall to H-shaped steel supports or the like even in an environment where vibrations due to wind or cars occur.

A steel plate is bent and fixing, fittings 1 comprising a bent portion 2 and an attaching portion 3 is formed, the attaching portion 3 is bent down and extended and the lower end portion is bent to the side of the bent portion 2 and a linking portion 4 is provided. The bend portion 2 is inserted to a gap between a panel and a support, the panel is fixed to the support by pressing the support by the resiliency of a spring, and the linking portion 4 is linked to the bottom end of attaching fittings or the like thereby preventing the pull-out of the fixing fittings 1 over a long period of time even in an environment where vibrations occur.