To provide a dome type mobile snow/ice box for snow storage capable of moving to an existing position of a block body of snow of a high snow density state in outdoors, and covering its periphery, a simplified in structure.

The snow/ice box 10 is divided into a plurality of blocks 11. Each block 11 is partitioned by support frame bodies 12 with semicircular shapes as seen from the side, and the support frame bodies 12 are connected by side wall materials 13 having flexibility. Wheels 14 are provided on the bottom of each block 11 and placed on rails 15 guiding the snow/ice box to a position wherein the block S of snow is formed. During nonuse, the whole of the snow/ice box 10 is brought into a folded state by bringing the support frame bodies 12 close to one another, and warping the side wall material 13 of each block 11.