Outside air into the passenger compartment (15) the upper dashboard member (17) in which is introduced into, when the vehicle (10) collides with the front obstacle, elongated front hood (31) upward to a predetermined amount lifted actuation units (40) is a vehicle body front structure is located. The vehicle body (11), the operation unit after extended upwards (40), by an external force acting from above, is mounted so as to be displaced downward. Opening for draining to the bottom portion of the dashboard upper (17) (17b) (17d) is provided, this opening (17d), the operating unit after extended upwards (40) acts from above It is arranged on a movable position downward by the external force.