A linkage for opening and closing a lid through actuation of an electric motor 12 includes a base bracket 21 extending in a longitudinal direction of a vehicle, and a driving lever 14 having one end pivotally connected to the bracket 21 and the other end connected to the lid. The driving lever is driven via a pinion 22 by a sector gear 31 driven by the electric motor. The sector gear is attached to the bracket 21. The electric motor is fixed to a motor bracket 11 and attached via the motor bracket 11 to the bracket. Loosening a member supporting a lateral end portion of the motor bracket 11 and a bolt 41 fixing the bracket 11 to the bracket 21 allows the pinion and the sector gear to be axially disengaged from each other.