Blade for a wind turbine rotor

Blade (1) for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub, from which the blade (1) extends substantially radially when mounted, said blade (1) comprising a chord plane (K) extending between the leading edge (5) and the trailing edge (6) of said blade, and said blade (1) comprising a root area (2) closest to the hub, an airfoil area (4) furthest away from the hub and a transition area (3) between the root area (2) and the airfoil area (4), and said blade (1) comprising a single airfoil substantially along the entire airfoil area (4), characterized in that the blade (1) comprises at least a first root segment (7) and a second root segment (8) along substantially the entire root area (2), said segments being arranged with a mutual distance transverse to the chord plane (K), and that at least one of the root segments (7, 8) has an airfoil profile, wherein the total length of the root area and the transition area is between 5% and 25% of the total length of the blade, and wherein the root area (2) of the blade (1) is provided with a number of mounting holes (11) disposed along a circle.