PROBLEM TO BE SOLVED: To provide a generation method of whale repellent noise in water which is effective for a wide range of kinds of whale and a generator of whale repellent noise in water.SOLUTION: In a generation method of whale repellent noise in water, travel sound of a whaling ship which has repellent effect within an audible frequency band of whales as repellent noise which has whale repellent effect and a sound source of a sound generating stick which has whale repellent effect used for pushing-in fishing of whale are adjusted and synthesized.