PURPOSE: To prevent entanglement of pipings for a rotary valve of multi-circuit type by furnishing it with an outer valve body formed cylindrical and an inner valve body to be inserted in the outer valve body airtightly and rotatably, and connecting the pipe fitting for one of them with the flow-in side pipeline and the pipe fitting for the other valve body with the exhaust side pipeline.

CONSTITUTION: A rotary valve A has a cylindrical outer valve body 1 fixed to an upper supporting table 4 secured to a fluid pressure source and an inner valve body 2 to be inserted into the outer valve body rotatably, wherein the inner valve body 2 is secured to a table center 7 rotated by a motor 6. The outer valve body 1 is provided at the periphery with six flat seats 12a-12f for mounting pipe fitting and stretching in the longitudinal direction, and a pipeline 15 on the fluid flow-in side is connected with threaded holes 131, 13a2-13f1, and 13f2 furnished in two places above and below on each seat 12a-12f through outside pipelines 14a1, 14a2-14d1, and 14d2. Through a pipe fitting 22, the pipeline 21 on the fluid exhaust side is connected with the flange part of the inner valve body 2.