Abstract: A propeller (1) for a wind motor (12), wherein: the propeller (1) is rotatable about a rotation axis (2) which is inclined by an angle of essentially 45 degrees with respect to the horizontal plane, the propeller (1) has at least two propeller blades (3), each of which having a blade axis (4) extending perpendicularly from the rotation axis (2), and each one of said propeller blades (3) has a front side (5) and a rear side (6), the front side (5) being intended to face towards the wind during at least a part of a revolution about the rotation axis (2), wherein each one of said propeller blades (3) is inclined by an angle of essentially 45 degrees with respect to the rotation axis (2).