Support for fastening an electric motor to a tub inside a household appliance for rotatingly driving a drum of said household appliance, said support comprising: a main body designed to support the electrical motor in a fixed position with respect to the tub, a pulley of said electric motor protruding at the rear with respect to said main body; two attachment elements (23A, 24A), designed for the coupling with respective attachment points of the tub in an assembled configuration, said attachment elements (23A, 24A) being arranged above and at the rear with respect to said main body wherein the terms front and rear, above and below should be interpreted considering the support mounted on a household appliance in its normal use configuration, the household appliance having a loading door at the front and a belt drive connecting the electric motor and drum at the rear; said support further comprising: at least one abutment element protruding above and in a rear position with respect to the main body, said abutment element being designed to be arranged, in an assembled configuration, abutting against a rear surface of the tub without being inserted in a dedicated seat of the tub; wherein said abutment element comprises an appendix which is radial with respect to the main body and shaped on the upper part in order to adapt to a rear surface of the tub; characterized in that said appendix comprises, at least in its upper portion, two parallel ribs designed to house therebetween a ribbing feature of the rear wall of the tub. a main body designed to support the electrical motor in a fixed position with respect to the tub, a pulley of said electric motor protruding at the rear with respect to said main body; two attachment elements (23A, 24A), designed for the coupling with respective attachment points of the tub in an assembled configuration, said attachment elements (23A, 24A) being arranged above and at the rear with respect to said main body wherein the terms front and rear, above and below should be interpreted considering the support mounted on a household appliance in its normal use configuration, the household appliance having a loading door at the front and a belt drive connecting the electric motor and drum at the rear; said support further comprising: at least one abutment element protruding above and in a rear position with respect to the main body, said abutment element being designed to be arranged, in an assembled configuration, abutting against a rear surface of the tub without being inserted in a dedicated seat of the tub; wherein said abutment element comprises an appendix which is radial with respect to the main body and shaped on the upper part in order to adapt to a rear surface of the tub; characterized in that said appendix comprises, at least in its upper portion, two parallel ribs designed to house therebetween a ribbing feature of the rear wall of the tub. at least one abutment element protruding above and in a rear position with respect to the main body, said abutment element being designed to be arranged, in an assembled configuration, abutting against a rear surface of the tub without being inserted in a dedicated seat of the tub; wherein said abutment element comprises an appendix which is radial with respect to the main body and shaped on the upper part in order to adapt to a rear surface of the tub; characterized in that said appendix comprises, at least in its upper portion, two parallel ribs designed to house therebetween a ribbing feature of the rear wall of the tub.