To protect the head of a human body by producing a hat provided with functions to screen electromagnetic waves applied to the head of the human body and enhance the protecting effects on the head of the human body against solar heat under the blazing sun and further prevent damages concerned in human health within a considerable range in the society, maintain the health of even one more persons and contribute to an improvement in the social life and economical development by providing a method for producing the hat.

This hat is obtained by attaching a device, formed according to the shape of the hat and capable of protecting the head of a human body from solar heat under the blazing sun while screening electromagnetic waves on the inside of the hat.