<p>PURPOSE: A regulator of an AC generator for a vehicle is provided to prevent the inflow of moisture into a housing via a free frame by installing a rubber ring in the middle part of a lead frame or changing the shape of the lead frame. CONSTITUTION: A lead frame is electrically connected to a terminal of a commutator. A lead frame is inserted into a housing(112). A connector part(113) is formed in one side of the housing. A part of the lead frame is exposed to the outside through the connector part and a bolt hole(114). A sealing unit is formed in the middle part of the lead frame and prevents moisture from entering from the outside. The sealing unit includes a bent part and a rubber ring. The bent part is formed by bending the lead frame. The rubber ring is fitted to the lead frame at a start point of the bent part. The rubber ring and the lead frame are inserted.</p>
