A Bluetooth headset for a helmet having an inter-communication is provided. The Bluetooth headset includes a headset body configured to be mounted on a helmet, a microphone and a speaker that are configured to be installed on the headset body, a jog dial configured to be installed to perform a rotation operation and be subject to a push operation, a Bluetooth module configured to be accommodated in the headset body and to perform wireless communication while paired with an external Bluetooth device, and a control unit configured to be accommodated in the headset body to process a signal input from the microphone, a signal input according to the rotation operation and the push operation of the jog dial and a signal received from the Bluetooth module and output the processed signal to the speaker and the Bluetooth module.