A dumbbell equipped with a heater is provided to prevent inconvenience of heating a dumbbell using a gas range or electric heater in exercise. A dumbbell comprises: a pipe(4) which includes a plug(12), an electric wire(13) connected to the plug; a heater(18) established in the middle part of the pipe, which includes a core bolt(8), a core nut combined with the periphery of the core bolt, and a heating coil(11) able to be heated by electric power; and a barbell wrapping the exterior of the heater.
