possible to omit a drain member which is conventionally provided on the dash side panel and therefore the number of parts and the number of assembling steps are reduced which is advantageous in terms of the costs since the conventionally provided flanges are utilized as the flanges 14 and 16 for damming and guiding the liquid such as rainwater the costs can further be reduced further since the rainwater flowing out from the cowl top panel 10 is dammed and guided by the upper end joint flange 16 of the cowl top side panel 7 and flows into the opening 19 the rainwater dose not flow on and drop from the rear hood ridge reinforce 6 furthermore since the cowl top side panel 7 is formed with the recess 18 and the joint portion between the front hood ridge reinforce 3 and the cowl top side panel 7 is formed with the opening 19 the number of drilling steps can be reduced the opening 19 can not easily be seen at the time of maintenance of the engine and thus an outward appearance of the body in such a case is enhanced although the present invention has been described based on the vehicle of a type in which the cowl top panel 10 is extended forward and the lower end of the front window glass 17 is supported by the panel 10 the present invention should not be limited to the vehicle of this type only and the invention is also applicable to a vehicle of a type in which the cowl top panel is not extended the invention is also applicable to a vehicle in which the hood ridge reinforce 1 is not divided in front and rear.