A fluid pump 1, particularly a water pump 1, wherein an impeller 11 comprising a plain bearing bush 12 is rotatably supported on a bearing pin 13. The impeller 11 and the plain bearing bush 12 are thereby made of an identical base material in one or more pieces. A further material is mixed into the base material of the plain bearing bush 12, improving the sliding properties of the plain bearing bush 12 on the bearing pin 13.