The invention relates to a cutter head for an excavator machine including at least one cutter motor, each cutter motor comprising: a fastener plate; a mounting structure secured to the fastener plate and presenting a central portion and two mounting assemblies disposed on either side of the fastener plate; two hydraulic motors mounted in said mounting assemblies; a shaft common to both hydraulic motors; a plurality of conduits formed in the thickness of said fastener plate for passing the flow of the liquid used by the hydraulic motors; and a plurality of ducts formed in said central portion of the mounting structure, said ducts being connected to said conduits and to said hydraulic motors to connect each of the two motors to each of said conduits.