To provide a hydraulic drive cook system that can be endured for the usage even under the severe environment of pitching and rolling like a boat.

A hydraulic actuator that operates at least one cook and a operation gear of the hydraulic actuator are equipped with a ship. The operation gear 7 of the hydraulic actuator for operating the cook is equipped with a motor 8 that is an electric motor especially, a hydraulic pump 9 that is a gear pump especially and an accumulating reservoir 10 with a case 11. This accumulating reservoir 10 is installed in the plane face where is fixed to the ship.