A metal detector of the disclosure includes a detection head, a supporting rod, and a headset. The supporting rod is connected with the detection head. A first control printed circuit board (PCB) is located inside the supporting rod, and is electrically connected to the detection head. The headset includes a second control PCB connected to the first control PCB by wireless communication, and a display electrically connected to the second control PCB. When an operator wears the headset, a visual direction of the operator keeps within a display range of the display. The detection head detects a metal signal, the first control PCB transmits the metal signal to the second control PCB by wireless communication. The second control PCB transforms the metal signal into a video signal transmitted to the display to display for the operator.