The present invention relates to a heat generator including a central shaft, an elastic body formed to be a predetermined thickness at a circumference of the central shaft, a conductor layer formed to be a predetermined thickness at a circumference of the elastic body, and a second elastic body formed to be a predetermined thickness at a circumference of the conductor layer, and an apparatus including a magnetic field generator which provides a magnetic field such that the conductor layer of the heat generator can generate heat, and a pressure member which is provided along the central shaft of the heat generator, and applies pressure that deforms the elastic body layer by a predetermined amount to a predetermined position of the central shaft or the heating generator.