A cowl section structure for a vehicle includes a cowl top cover arranged between a bonnet and a windshield and a contact piece portion. The cowl top cover includes a windshield fitting member provided to a lower end portion of the windshield and a protruding claw extending in a direction in which the protruding claw is inserted into an engagement recessed portion of the windshield fitting member. The contact piece portion is arranged in a space between the protruding claw and the engagement recessed portion. One end of the contact piece portion comes into contact with a tip end portion of the protruding claw. An opposite end of the contact piece portion comes into contact with an inner wall of the engagement recessed portion of the windshield fitting member.