Electric machine comprising: - at least one stator (14, 18), - a shaft movable in rotation around an axis of rotation, - two distinct rotors (16, 20), each being interdependent of the shaft, - at least two bearings (24, 26, 28) specific to supporting the two rotors (16, 20) and the shaft, one single bearing of said bearings (24, 26, 28) being arranged between the two rotors (16, 20) around the axis of rotation, wherein: each rotor (16, 20) comprises a main body extending along the longitudinal axis, the main body comprises a stack of metal sheets engaging with two clamping members, flange-shaped, disposed on either side of each axial end of this stack, the two clamping members are mechanically connected by fastening anchors, the fastening anchors extending along the longitudinal axis and passing through on either side of the stack of sheets along the longitudinal axis; and the shaft comprises three shaft ends, each rotor (16, 20) is interdependent of two shaft ends, the three shaft ends being fastened to the corresponding clamping members or the clamping members being made in one piece with the corresponding shaft ends, a shaft end disposed between the two rotors (16, 20) being common to the two rotors (16, 20) and the three shaft ends being interdependent in rotation around the axis of rotation. - at least one stator (14, 18), - a shaft movable in rotation around an axis of rotation, - two distinct rotors (16, 20), each being interdependent of the shaft, - at least two bearings (24, 26, 28) specific to supporting the two rotors (16, 20) and the shaft, one single bearing of said bearings (24, 26, 28) being arranged between the two rotors (16, 20) around the axis of rotation, wherein: each rotor (16, 20) comprises a main body extending along the longitudinal axis, the main body comprises a stack of metal sheets engaging with two clamping members, flange-shaped, disposed on either side of each axial end of this stack, the two clamping members are mechanically connected by fastening anchors, the fastening anchors extending along the longitudinal axis and passing through on either side of the stack of sheets along the longitudinal axis; and the shaft comprises three shaft ends, each rotor (16, 20) is interdependent of two shaft ends, the three shaft ends being fastened to the corresponding clamping members or the clamping members being made in one piece with the corresponding shaft ends, a shaft end disposed between the two rotors (16, 20) being common to the two rotors (16, 20) and the three shaft ends being interdependent in rotation around the axis of rotation. each rotor (16, 20) comprises a main body extending along the longitudinal axis, the main body comprises a stack of metal sheets engaging with two clamping members, flange-shaped, disposed on either side of each axial end of this stack, the two clamping members are mechanically connected by fastening anchors, the fastening anchors extending along the longitudinal axis and passing through on either side of the stack of sheets along the longitudinal axis; and the shaft comprises three shaft ends, each rotor (16, 20) is interdependent of two shaft ends, the three shaft ends being fastened to the corresponding clamping members or the clamping members being made in one piece with the corresponding shaft ends, a shaft end disposed between the two rotors (16, 20) being common to the two rotors (16, 20) and the three shaft ends being interdependent in rotation around the axis of rotation.