A caring shell for hermit crab is provided. The caring shell comprises a main shell and a movable cover. The main shell has an opening, a through hole, and a receiving chamber. The receiving chamber is formed within the main shell for receiving the body of the hermit crab. The opening is formed on the front of the main shell for hermit crab moving into the receiving chamber. The through hole is formed on the main shell and communicates the receiving chamber and the outer space out of the main shell. Therefore, the body of the hermit crab within the movable cover can be obversed or touched via the through hole. The movable cover can assembled to the main shell for optionally opening and closing the through hole.