Abstract: At a fan shroud constituting a cooling unit are provided a fan opening portion with an electric fan and a door opening portion that includes a plurality of door openings that are formed substantially vertically in line. A slant portion is formed on the door opening portion in such a manner that positions of the door openings which are located at a relatively upper level of the door opening portion and the doors provided at these door openings are located respectively forward relative to those of the other door openings and the other doors. Accordingly, any interference of the doors with other parts in the engine room can be prevented properly.