To provide a wind and hydraulic power generator capable of operating at a high speed by creating Coanda effect by a shape of a nacelle to increase speed of fluid and apply the same on a propeller.

This wind and hydraulic power generator 1 is provided with the propeller 5 in a rear part of the nacelle 3 rotatably provided on a column 2. High speed fluid flow faster than flow speed caused by Coanda effect is generated on a circumference surface of the nacelle, and is made pass through to a front surface of the propeller 5.