The present invention relates to a toothbrush comprising: a cleaning head [2]； a handle [l]； a neck [3]-having a longitudinal axis disposed between the head and the handle, the neck comprising a longitudinal region formed by a cylindrical wall constructed of a hard plastic that circumferentially surrounds the longitudinal axis so as to form a cavity in the longitudinal region； a vibration-generating device [5] enclosed within a structural housing [15], the structural housing positioned within the cavity； and characterized in that the cylindrical wall having a section of reduced thickness for reducing transmission of vibrations toward the handle.
