Valve device

The invention provides a valve device which does not change the flow of one flow outlet and reduces the flow of the other flow outlet. A housing chamber defining an inflow port, a first outflow port having a first opening width in the circumferential direction and a second outflow port having a second opening width in the circumferential direction, the first outflow port and the second outflow port being provided separately in the circumferential direction on an inner circumferential surface centered on the axis; and a cylindrical valve body disposed in the housing chamber and capable of opening and closing the first outflow port and the second outflow port, the valve body including: an internal passage communicating with the inflow port; a first outflow communication port that expands in one direction in the circumferential direction continuously with a region facing the first outflow port in order to communicate the internal passage with the first outflow port, and that has an opening width larger than the