To provide a multiway valve with its respective valve spools independently operating in a common housing.

The valve housing 1 is formed with an approximately cylindrical axial hole 2 and the hole 2 is formed with inner chambers 4a, 4b, 5a, 5b, and 6 connected to an exhaust port or a feed port. A pressure medium flow between the respective ports is changed over by the positions of the spools including two valve spools 9a and 9b. The valve spools 9a and 9b are axially slidable in the holes 2 independently. Driving pistons 12a and 12b move the respective valve spools 9a and 9b by the control pressure. The exhaust chamber 6 has a connecting part with the exhaust ports 8a and 8b. An exhaust wall 13 is exchangeably arranged in the common exhaust chamber 6 between inside ends of the two valve spools 9a and 9b, divides the exhaust chamber 6 into two parts, and directly connects a major exhaust air flow from the respective valve spools 9a and 9b to the exhaust ports 8a and 8b.