To provide a multifunctional helmet making it possible that a person rapidly takes a whistle in the mouth without using the hand, has a conversation by removing the whistle, when does not use the whistle, and conducts simple control of electronic equipment.

This multifunctional helmet is equipped with an arm 3, a joining part 2, a lever part 4, and a sensor 39, wherein the arm 3 has a plurality of joint mechanisms, flexibly moves, and is contractable, the joining part 2 joins with one of ends of the arm 3 and further joins with a side wall of a main body of the helmet, the lever part 4 is attached to the other end of the arm 3 and carries a loaded material to the mouth by being swung by the movement of the chin, and the sensor 39 is attached to the loaded material. Therefore, the person can conduct simple operation of the electronic equipment by the helmet.

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