To provide a three-dimensional puzzle which is available as a container such as a gift box.

When prescribed center pieces 43 to 46 are adjacent to prescribed edge pieces 15, 11, 18, and 12 and prescribed edge pieces 13, 16, 20, and 21 are adjacent to prescribed corner pieces 32, 31, 36, and 35, engagement between projection edges 122 of the edge pieces 15, 11, 18, and 12 and projections 414 of the center pieces 43 to 46 is released, engagement between projection edges 313 of the corner pieces 32, 31, 36, and 35 and projections 4 provided at blocks 52 fixed to the edge pieces 13, 16, 20, and 21 is released, a lid body B including a plurality of blocks 51 to 53 is separated from a case body A including a plurality of other blocks 51 to 53, and the inside of a spherical body core 2 is exposed outside.