Lifting device for a wind turbine component comprising: a yoke for connecting the wind turbine component to a crane together with a hook and attachment cables, said yoke including at least one anchor point (P1, P2) connectable to a forcing system (21, 22) for pushing or pulling the yoke in order to rotate the yoke around a central axis of the yoke said central axis, during the installation operations, is aligned to the rotational axis of the hook, in order that the yoke, the hook and attachment cables can be rotated together around the rotational axis of the hook (3, wherein said yoke being configurable in at least a first closed configuration, wherein in the first closed configuration the at least one anchor point (P1, P2) is at a first distance (R11, R12) from the central axis of the yoke, and at least a second extended configuration, wherein in the second extended configuration the at least one anchor point (P1, P2) is at a second distance (R21, R21) from the central axis of the yoke, being the second distance (R21, R22) greater than the first distance (R11, R12); and wherein said yoke comprises a main body and at least two movable arms (17, 18), the at least said two movable arms (17, 18) being movable with respect to the main body between at least the first closed configuration and the second extended configuration, each of the two movable arms (17, 18) comprising a respective anchor point (P1, P2); wherein the movable arms (17, 18) are arranged to rotate, with respect to main body of the yoke, in a plane orthogonal to the central axis of the yoke characterised in that the movable arms (17, 18) are arranged to rotate, with respect to the main body of the yoke, in a plane including the central axis of the yoke, folding in and out between the closed and the extended configuration. a yoke for connecting the wind turbine component to a crane together with a hook and attachment cables, said yoke including at least one anchor point (P1, P2) connectable to a forcing system (21, 22) for pushing or pulling the yoke in order to rotate the yoke around a central axis of the yoke said central axis, during the installation operations, is aligned to the rotational axis of the hook, in order that the yoke, the hook and attachment cables can be rotated together around the rotational axis of the hook (3, wherein said yoke being configurable in at least a first closed configuration, wherein in the first closed configuration the at least one anchor point (P1, P2) is at a first distance (R11, R12) from the central axis of the yoke, and at least a second extended configuration, wherein in the second extended configuration the at least one anchor point (P1, P2) is at a second distance (R21, R21) from the central axis of the yoke, being the second distance (R21, R22) greater than the first distance (R11, R12); and wherein said yoke comprises a main body and at least two movable arms (17, 18), the at least said two movable arms (17, 18) being movable with respect to the main body between at least the first closed configuration and the second extended configuration, each of the two movable arms (17, 18) comprising a respective anchor point (P1, P2); wherein the movable arms (17, 18) are arranged to rotate, with respect to main body of the yoke, in a plane orthogonal to the central axis of the yoke characterised in that the movable arms (17, 18) are arranged to rotate, with respect to the main body of the yoke, in a plane including the central axis of the yoke, folding in and out between the closed and the extended configuration.