To flush a urinal by utilizing ozone water, to interlock a flushing device with a flush valve, to incorporate the device into an equipment chamber in the upper section of a urinal body and to eliminate the need for an excess space.

An equipment chamber 2 is installed to the upper section of a urinal body 1a, a flush valve 4 and an ozone-water generator 5 are assembled to the equipment chamber 2, an excess space is omitted and the urinal is flushed by ozone water while being interlocked with flushing operation. The flush valve 4 and the ozone-water generator 5 are mounted on a common base plate 7 fixed to the upper section of the urinal body 1a, and maintained easily.