Sample and Experiment.Magnetization properties of amorphous ribbon, Co-based Fe, Ni, MO, B, Si, compound, have been investigated. The hysteresis curves of the heat-treated amorphous ribbon showed a very unique behavior under tensile applied. For example, a Co-based amorphous ribbon, which has negative magnetostriction constant, showed a tensile insensitive magnetization.The magnetization does not decreases despite tensile applies.