The utility model provides a brush head of an electric toothbrush. The brush head comprises a brush rod, a circular brush head and a swing rod, wherein the circular brush head is arranged at one end of the brush rod in a manner of swinging left and right； the swing rod is fixedly and installed in the brush rod； a location device is arranged at the lower end of the circular brush head, and comprises a location shaft, a shaft sleeve and a first location pin； the location shaft and the shaft sleeve are installed in the circular brush head in a matching manner, one end of the swing rod stretches into the circular brush head, and the other end of the swing rod is connected with a motor； one end of a first location pin is fixed with the circular brush head, and the other end of the first location pin is fixed with the brush rod. The brush head provided by the utility model is simple in structure, convenient to detach and install, and convenient to clean teeth.
