To provide a simple cooling device capable of obtaining cooling effect by preventing sunshine and high heat in the scorching outdoor heat.

This cooling device is composed of a container and a water absorption body absorbing and evaporating liquid, a part of the water absorption body is disposed in the container in a fixed or movable state, the water absorption body outside of the container is disposed as a cover of a cooled object, the liquid stored inside of the container is absorbed and evaporated, and cooling effect is exerted by releasing heat of vaporization. An upper part of the cylindrical cloth or net-like water absorption body is bundled and throttled to be used as a water absorption opening, and its lower part is expanded to be used as the cover. A take-up tool of the water absorption body is disposed in the container. The cooling device having the constitution is provided. This sheet for cooling is composed of a sheet-like body formed by adhering the water absorption material on a surface of the sheet or net-shaped body capable of being formed into a box or a cylinder, and exerting cooling effect when it is used as the cover of the cooled object in a state of being dipped in the liquid such as water at its lower end.