A tuned mass damper for damping vibrations in a structure, the tuned mass damper comprising: - an elongated element having a free end and a joint end opposite to the free end; - a fixation member for being fixed to the structure; - a mass arrangement connected to the elongated element, wherein a line between the fixation member and the mass arrangement defines a neutral axis in a neutral position of the elongated element; - a joint arranged between the joint end and the fixation member, the joint being arranged to allow movements of the elongated element in at least one displacement plane (XZ, YZ) comprising the neutral axis; - a spring arrangement (30, 32) arranged to exert a restoring spring force to the elongated element when the elongated element is displaced from the neutral position; and - a damping arrangement (34, 36) arranged to exert a damping force against movements of the elongated element from the neutral position wherein the at least one displacement plane (XZ, YZ) comprises a first displacement plane and a second displacement plane; wherein the first displacement plane is non-parallel with the second displacement plane; wherein the spring arrangement (30, 32) comprises a first spring associated with the first displacement plane and a second spring associated with the second displacement plane; and characterized in that an attachment point of the first spring and/or an attachment point of the second spring is adjustable in order to adjust a spring characteristic of the spring force, thereby enabling different natural frequencies of the tuned mass damper in the respective first and second displacement planes. - an elongated element having a free end and a joint end opposite to the free end; - a fixation member for being fixed to the structure; - a mass arrangement connected to the elongated element, wherein a line between the fixation member and the mass arrangement defines a neutral axis in a neutral position of the elongated element; - a joint arranged between the joint end and the fixation member, the joint being arranged to allow movements of the elongated element in at least one displacement plane (XZ, YZ) comprising the neutral axis; - a spring arrangement (30, 32) arranged to exert a restoring spring force to the elongated element when the elongated element is displaced from the neutral position; and - a damping arrangement (34, 36) arranged to exert a damping force against movements of the elongated element from the neutral position wherein the at least one displacement plane (XZ, YZ) comprises a first displacement plane and a second displacement plane; wherein the first displacement plane is non-parallel with the second displacement plane; wherein the spring arrangement (30, 32) comprises a first spring associated with the first displacement plane and a second spring associated with the second displacement plane; and characterized in that an attachment point of the first spring and/or an attachment point of the second spring is adjustable in order to adjust a spring characteristic of the spring force, thereby enabling different natural frequencies of the tuned mass damper in the respective first and second displacement planes. wherein the at least one displacement plane (XZ, YZ) comprises a first displacement plane and a second displacement plane; wherein the first displacement plane is non-parallel with the second displacement plane; wherein the spring arrangement (30, 32) comprises a first spring associated with the first displacement plane and a second spring associated with the second displacement plane; and characterized in that an attachment point of the first spring and/or an attachment point of the second spring is adjustable in order to adjust a spring characteristic of the spring force, thereby enabling different natural frequencies of the tuned mass damper in the respective first and second displacement planes.