NOVELTY - The structure has a curved part (13) curving a harness (8) in U-shape between an engine edge part and an edge part of a control module (6). A protection member protects the curved part and fixed to a side of a vehicle body. A battery is arranged at an engine of a vehicle along width direction. An air cleaner is arranged by a front side of the battery. The protection member is fixed to the front side of the battery. An engine side part and a control module side part of the protection member are provided with restraint parts (15,16) for restraining the harness.    USE - Structure for fixing a harness to an engine of a vehicle.    ADVANTAGE - The engine and the control module for power trains are adjoined as the protection member is fixed to the front side of the battery, so that length of the harness can be ensured, and vibration and tension fluctuation input into the harness from the engine can be effectively absorbed in the curved part, thus preventing the harness from being damaged effectively. The restraint part restraining the harness is provided in the engine side part and the control-module side part for power trains, so that transmission of vibration can be controlled via the harness, thus avoiding the vibration input into the harness from the engine at the time of engine action transmitted to an exterior of the protection member. The structure is provided with a fixing part, which fixes the protection member to a battery case in which the battery is accommodated in an easy manner so as to support the battery stably, so that the curved part of the harness can be supported stably. The curved part is arranged in the protection member, so that a dead space formed by providing the curved part in the protection member can be utilized effectively, and the joint part can be efficiently arranged by easy and compact structure, thus protecting the joint part effectively. The protection member is arranged with a branch part of a branch line so as to protect the branch part of the branch line effectively.    DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a structure for fixing harness to an engine of a vehicle.    Engine (1)    Control module (6)    Harness (8)    Curved part (13)    Restraint parts (15,16)