To provide a method, a structure, and an instrument for extracting an impeller that has a simple structure and a simple mounting operation, is suitable for use in a narrow space, and can uniformly operate a fastening force of a screw independently of the number of blades of an impeller.

This impeller extracting tool 20 is formed by screwing a body 21 having a male screw part 23 fitting to a female screw part 13 formed in the end of the inner peripheral surface of a bush 11 of the impeller 10 and also having a through female screw in its center with a pressing bar 22 having a male screw on the outer peripheral surface. The male screw part 23 of the body is screwed into the female screw part 13 of the bush, and the pressing bar 22 is further screwed, thereby pulling the impeller out of a rotation driving shaft of the pump.