Abstract: The invention relates to an electrically driven drum motor 1 comprising a substantially cylindrical drum 2 of noncorroding material, especially in the form of an electrically driven conveyer roller, said drum 2 having annular end edges 12 and being connected with two circular end caps 14, 15 to define, together with these, an internal space to receive an electric motor 7, said end caps 14, 15 being provided with a central opening 18 for a rigid shaft 6 for the drum motor 1, which is characterized in that each end cap 14, 15 is firmly connected with an external, separate jacket 30 of noncorroding material, especially stainless steel or plastic, said jacket 30 having a central opening 31 for the rigid shaft (6) of the drum motor, and said jacket 30 being formed as a circular disc of a relatively thin plate which is formed integrally with a peripheral flange 35, said flange 35 being formed to tightly engage an end edge 12 of the cylindrical drum 2 and to form a smooth transition to the external surface of the cy