It is an object of the present invention to provide a method for producing a magnetostrictive element, capable of assuredly producing a magnetostrictive element by powder metallurgy. In a container for sintering 10, a compact 100 is sintered into a magnetostrictive element having a composition of SmFe.sub.2 while held by a support 20 of SmFe.sub.2 or Nb stable during the sintering step. The support 20 is composed of particles coming into contact with the compact 100 at multiple points, to control fusion-bonding between the support 20 and the compact 100 to a limited extent.