Abstract: A cabin ventilator for car, wherein a flexible vent pipe (1) allowing to communicate between a cabin inside space (4) and a cabin outside space (5) is disposed, a blower (2) is connected to the vent pipe (1) so as to exhaust air from the cabin inside space to the cabin outside space, a solar battery panel part (3) is disposed in the cabin inside space at a position where sunlight is radiated for supplying electric power to the blower, and a shade assembly (16) is installed on at least one of the inside surface of a window glass (15), an inside window frame portion, and a dashboard (6) so that the shade assembly can cover the window glass together with the solar battery panel part from the inside of the cabin during the parking of the car.