To provide an ozone water generator capable of generating ozone water with high concentration at high efficiency.

The ozone water generator 100 comprises: a water tank 1 storing water; and a catalyst electrode 2 arranged in the water tank 1 and generating ozone water by being contacted with the water and further applied with dc voltage. The catalyst electrode 2 has a profile where the front edge 2a on the upstream side of the flow in the water has a roundness, and the post edge 2b on the downstream side has a pointed form in a plane cross sectional view.