An image heating device includes a belt, a wire stretched from one widthwise end to the other widthwise end of the belt near a peripheral surface of the belt, a moving member movably fixed to one end of the wire, a biasing member, a detection unit, and a control unit. The belt heats an image on a sheet. The biasing member biases the moving member. The detection unit detects, from a biasing force of the biasing member provided when the wire is cut, that the moving member is moved. The control unit controls, according to an output of the detection unit with regard to detecting that the moving member is moved, whether or not to prohibit an image heating process.