To provide a hinge in a special shape and a grooved panel suitable for a system in which the assembling work of panels with each other is performed in a preparation process before carrying them in as a method of shortening setup time by partition panels to be used for setting up a trade fair site, an exhibition site or a special event site or the like.

A roughly U-shaped aluminum frame 21 having a roughly U-shaped groove is fixed to partition panels 6 and 7, vanes 23 and 24 in the special shape of a hinge 22 are fitted to the roughly U-shaped aluminum frame 21, and the partition panels 6 and 7 are connected.