fig4 a next a locking construction of the engine hood will be described as shown in fig2 5 and 6 adjacent an inner face of a side wall of the engine hood 12 on the the side of the opened end thereof there are provided an engaging mechanism b for effecting restrictions of movement of the engine hood in the right and left direction and of the upward pivotal movement of the same and a lock mechanism c for restricting the movement of the engine hood 12 in the fore and aft direction of the vehicle body the engaging mechanism b includes an elastic engaging member 17 an engaging portion comprised of a plate spring attached to the inner face of the side wall of the engine hood 12 and a mating square opening 13b an engaged portion formed in the shield plate 13 as a member fixed to the vehicle body in operation as the elastic engaging member 17 comes into engagement with the square opening 13b in association with a movement of the engine hood 12 in the forward direction of the vehicle body the right to left movement and upward pivotal movement of the engine hood 12 are restricted by this engagement incidentally the engaging member 17 constituting the engaging portion is not limited to the elastic member such as described above but may be a rigid projection instead in the above it is preferred in the condition of fig4 a that the support.