The utility model relates to a retracting mechanism used for retracting or erecting a rear-view mirror. The utility model comprises a connecting maintenance part which is assembled with the connecting part of an output shaft of a drive motor and a worm wheel in a press fitting state, and rotating force transferring parts which are mutually and oppositely arranged between the connecting maintenance part and the connecting part in a scheduled gap state, wherein the connecting maintenance part is composed of a circular shaft part and a circular assembly hole, and the rotating force transferring parts are composed of double D incision parts and double D convex parts; the rotating force of the output shaft is transferred by the rotating force transferring parts, and the connecting state of the output shaft and the worm wheel are maintained on the same axial line; accordingly, the worm wheel can be prevented from tilting by the connecting maintenance part.