To provide an installing device of a game stand easy in mounting/dismounting work.

This installing device of the game stand is constituted; by holding a lever 2 having a guiding inclined face 6 and an engaging recessed part 3 on the front tip, on the inner frame side with a fulcrum by a support shaft 1 held by a holding metal fitting 10; installing a spring 11, so that turning resiliency acts between the lever and the holding metal fitting; and installing a hook metal fitting 4 for arranging a locking claw part 5 engaging with the recessed part on the outer frame side.