An actuator is longitudinally aligned along a side of the vehicle body in the fore and aft direction of the vehicle, and a lower and upper links connected to the actuator is widely opened and lift the hood, thereby minimizing the occupancy of the actuator and linkage, and preventing interference with adjacent components without changing the structure of the vehicle body. Moreover, the hood is lifted high enough for pedestrian safety using a relatively short stroke of the actuator, contributing to a formation of a compact structure as a whole and a prevention of the weight increase of the vehicle.