To provide a folding tent alleviating the burden of setting up the tent irrespective of the length of a central supporting post, and enabling freer design of the form of the tent.

The folding tent includes supporting posts 2, an outer peripheral frame 3, reinforcing frames 4 and the central supporting post 5. The outer peripheral frame 3 and the reinforcing frames 4 are respectively formed to have an extensible bellows shape by assembling a plurality of pipes to have an X shape. Each of the reinforcing frames 4 extends radially from the central supporting post 5. The central supporting post 5 is arranged in a vertically slidable manner with respect to the reinforcing frames 4, and can be moved upward after the outer peripheral frame 3 and the reinforcing frames 4 are extended.