A multi-way valve includes a valve housing and a valve body. The valve housing has an inner space formed therein, and includes a plurality of coolant inlet ports spaced apart from each other along a side surface thereof and a coolant outlet port penetrated along a central axis thereof. The valve body is inserted into the valve housing and rotates around a rotation axis thereof coincident with or parallel to the central axis of the valve housing. The valve body includes a plurality of inlet parts spaced apart from each other along a side surface thereof and an outlet part formed along the rotation axis thereof, the inlet parts and the outlet part communicating with each other, the outlet part facing the coolant outlet port to be connected thereto, the inlet part being selectively connected to the coolant inlet port by rotation thereof around the rotation axis thereof.