Capacitive interface device for a motor vehicle comprising: - a movable part comprising a capacitive interface comprising: - at least one capacitive sensor for detecting at least one contact of a user on the surface of the capacitive interface , and - a contact plate arranged on the capacitive sensor , - a fixed part intended to be fixed to the motor vehicle, and - a measurement device configured to measure a parameter representative of the pressing force exerted on the capacitive interface in a direction of indentation (Z), - at least one vibratory actuator linked to the capacitive interface so as to make the capacitive interface vibrate in the plane (X, Y) of the contact plate , and - at least one fixing and damping member interposed between the capacitive interface and the fixed part to link the movable part to the fixed part so as to allow a relative movement between the movable part and the fixed part , said relative movement comprising the vibration created by the vibratory actuator in the plane (X, Y) of the contact plate and the displacement of the movable part with respect to the fixed part in a direction of indentation (Z) at right angles to the plane (X, Y) of the contact plate , - the fixing and damping member exhibiting a greater stiffness in the direction of indentation (Z) than in the plane (X, Y) of the contact plate in which the movable part is capable of vibrating, - a haptic feedback unit linked to the measurement device and to the vibratory actuator , the haptic feedback unit being configured to drive the vibratory actuator as a function of a signal received by the measurement device. - a movable part comprising a capacitive interface comprising: - at least one capacitive sensor for detecting at least one contact of a user on the surface of the capacitive interface , and - a contact plate arranged on the capacitive sensor , - at least one capacitive sensor for detecting at least one contact of a user on the surface of the capacitive interface , and - a contact plate arranged on the capacitive sensor , - a fixed part intended to be fixed to the motor vehicle, and - a measurement device configured to measure a parameter representative of the pressing force exerted on the capacitive interface in a direction of indentation (Z), - at least one vibratory actuator linked to the capacitive interface so as to make the capacitive interface vibrate in the plane (X, Y) of the contact plate , and - at least one fixing and damping member interposed between the capacitive interface and the fixed part to link the movable part to the fixed part so as to allow a relative movement between the movable part and the fixed part , said relative movement comprising the vibration created by the vibratory actuator in the plane (X, Y) of the contact plate and the displacement of the movable part with respect to the fixed part in a direction of indentation (Z) at right angles to the plane (X, Y) of the contact plate , - the fixing and damping member exhibiting a greater stiffness in the direction of indentation (Z) than in the plane (X, Y) of the contact plate in which the movable part is capable of vibrating, - a haptic feedback unit linked to the measurement device and to the vibratory actuator , the haptic feedback unit being configured to drive the vibratory actuator as a function of a signal received by the measurement device. <EOS>