A wind turbine blade

A wind turbine blade (100) having a suction side and a pressure side, sides that are connected at a leading edge (114) and a trailing edge (112) including upper (100) a body of paddle (116; 216; 316) and one or more sections airfoil in editable form in the area of ​​the trailing edge (112) of the blade (100), each of the one or more sections of airfoil shape modifiable coating pressure (120) and a coating of suction (122), wherein the coating suction (122) is attached to or is integral with the blade body (116; 216; 316), and that the coating pressure (120) is slidably movable with respect to the blade body (116; 216; 316), so that a force applied to one of said coatings (120; 122) causes said pressure jacket (120) sliding with respect the blade body (116; 216; 316), to modify the shape of the airfoil trailing edge (112), in which - at least 10% of the length of the trailing edge (112), when measured from a tip portion (104) to a hub portion of the blade, is shape modifiable, and wherein - the portion modified form of the trailing edge (112) is closer to a tip portion ( 104) of the blade to a hub portion thereof.