A vehicle radiator apparatus includes: a radiator main body; a grill shutter unit configured to adjust the amount of air introduced from an opening in front of the radiator main body and flowing toward the radiator main body; and an air guiding plate provided to extend in a longitudinal direction below the radiator main body and the grill shutter unit to guide the air introduced from the opening to the radiator main body, in which the grill shutter unit includes: a shutter member configured to open or close the opening of a vehicle; and a shutter support member configured to support the shutter member, and including left and right side frame portions and an upper frame portion, and lower ends of the side frame portions are assembled and attached to an upper surface portion of the air guiding plate.