PURPOSE: To provide a hydraulic valve which enables the continuity and break of two sets of passages at the same time.

CONSTITUTION: A valve casing 3 is made by uniting right and left first and second casings 5 and 6, and inside the valve casing 3 is arranged one valve shaft 4, in which two valve bodies 41 and 42 are made at a certain interval, and the first passage 32 which connects a water suction port 53 with a water discharge port 54 through a valve port 52, is made in the first casing 5. Furthermore, the second passage 32, which connects a water suction port 63 with a water discharge port 64 through a valve port 62, is made in the second casing 6, and by the sliding of a common valve shaft 4, the first and second passages 31 and 32 are so constituted as to be capable of being connected or broken at the same time.