A head module (2) capable of reciprocal rotation for an electric cleaning apparatus, comprising a cleaning element (21), a head module housing (22), a head module driven rod (23) disposed in a hollow head module housing inner cavity (222) of the housing (22), the driven rod (23) being provided with a hollow cavity (239) for accommodating a drive shaft (11)； at least one driven rod gap (231) provided in a region surrounding the hollow cavity body (239)； at least one housing inner side notch (221) distributed on a side wall of the housing inner cavity (222), for accommodating a corresponding driven rod protrusion (233) disposed on the driven rod (23), the driven rod (23) further comprising a partially cylindrical or conical cavity body region (238). The diameter of the region (238) or the greatest diameter of a joining portion corresponding to the region (238) is less than the diameter of a cylinder region (113) of the drive shaft (11). When the drive shaft (11) is not yet inserted into the head module driven rod (23), there is a gap (240) between the housing inner side notch (221) and the driven rod protrusion (233) and perpendicular to a direction of the axis of rotation of the drive shaft (11) (L1). The length of the gap in the direction perpendicular to a direction of the axis of rotation of the drive shaft (11) (L1) is greater than or equal to the amount of single-side interference between the driven rod (23) and the drive shaft (11) of the head module.La présente invention concerne un module de tête (2) susceptible de rotation réciproque destiné à un appareil de nettoyage électrique, comprenant un élément de nettoyage (21), un logement de module de tête (22), une tige entraînée de module de tête (23) disposée dans une cavité creuse interne de logement de module de tête (222) du logement (22), la tige entraînée (23) étant prévue avec une cavité creuse (239) pour loger un arbre d'entraînement (11) ； au moins un espace de tige entraînée (231) prévu dans une région
