An operating member, comprising: a carrier; an actuation part, which is supported on the carrier and which forms a visible surface facing towards an operator that forms at least one insular actuation surface within the visible surface, wherein the actuation surface is formed by a cantilevered actuation portion of the actuation part; and the actuation portion is surrounded by an insulation portion of the actuation part, which is more flexible compared to the actuation portion, so that the actuation portion is supported so as to be capable of vibrating relative to the carrier; detection means (8, 9) for detecting a touch on the actuation surface and/or an actuation of the actuation part; an actuator fixed on the actuation portion of the actuation part on the side that, from the point of view of the operator, faces away from the operator, to which an electrical excitation signal (I(t)) is applied by the detection means (8, 9) in case of a positive detection of an actuation or touch, in order to excite a vibration of the actuation portion for a haptic feedback; wherein a dynamic rigidity of the actuation part determined along a measurement section (s) with a maximum length of 1 cm, leading from the actuation portion in or through the insulation portion and located on the visible surface, varies such that a first transfer function (U 1) determined at a beginning (x 1) of the measurement section (s) differs, for a continuous frequency range (X F) between 30 Hz and 1,000 Hz, by at least 5 dB from a second transfer function (U 2) determined at an end (x 2) of the measurement section for the same frequency range. a carrier; an actuation part, which is supported on the carrier and which forms a visible surface facing towards an operator that forms at least one insular actuation surface within the visible surface, wherein the actuation surface is formed by a cantilevered actuation portion of the actuation part; and the actuation portion is surrounded by an insulation portion of the actuation part, which is more flexible compared to the actuation portion, so that the actuation portion is supported so as to be capable of vibrating relative to the carrier; detection means (8, 9) for detecting a touch on the actuation surface and/or an actuation of the actuation part; an actuator fixed on the actuation portion of the actuation part on the side that, from the point of view of the operator, faces away from the operator, to which an electrical excitation signal (I(t)) is applied by the detection means (8, 9) in case of a positive detection of an actuation or touch, in order to excite a vibration of the actuation portion for a haptic feedback; wherein a dynamic rigidity of the actuation part determined along a measurement section (s) with a maximum length of 1 cm, leading from the actuation portion in or through the insulation portion and located on the visible surface, varies such that a first transfer function (U 1) determined at a beginning (x 1) of the measurement section (s) differs, for a continuous frequency range (X F) between 30 Hz and 1,000 Hz, by at least 5 dB from a second transfer function (U 2) determined at an end (x 2) of the measurement section for the same frequency range.