To provide a rain cover device for a car for preventing deposition of rain drops and snow on a windshield for the car in a rainy and snowy condition by fixing a plurality of plates to a supporting bar so that the plurality of plates are vertically arranged with a spacing in the horizontal direction, and installing a magnet in front of the windshield for the car outside the car.

In the rain cover device 20 for the car, a plurality of plates 1 are fixed to a supporting bar 2 so that the plurality of plates 1 are vertically arranged with a spacing in the horizontal direction, a magnet 3 is provided on one end, one end of the magnet 3 is installed outside the car, and a body 11 is arranged in front of a windshield for the car. Several partitions 4 are installed in the direction across the plurality of plates 1. A spindle 5 for adjusting the angle of inclination is provided on one end or both ends of each of the plurality of plates 1. In addition, a groove 6 is formed in the end while each plate 1 of the plurality of plates is projected in a V-shape in the advancing direction.