Abstract: The present invention relates to a hat for preventing a visual field from being covered. According to the present invention, the hat does not come off and does not cover the visual field when the user wearing the hat, which is attached to clothing, turns his or her head right or left or bends his or her body forward, thereby eliminating the risk of accidents. In addition, since the hat adheres to the wearer's head, the thermal effect and the wearing sensation are improved.