3D input device , in particular a mobile 3D input device, comprising: a housing ; an input element arranged in the housing , the input element having a first side and a second side opposite the first side ; and a sensor device ; wherein the input element is movable in six components relative to the housing, namely three displacements and three angular rotations in and about the three axes of a Cartesian coordinate system, respectively; wherein the sensor device detects the movement of the input element relative to the housing ; and wherein the first side or the second side or both sides together are configured such that a user can perform a movement of the input element along the six components by an action on the first side and/or the second side , and wherein the 3D input device comprises at least one spring device , the spring device being connected with the housing and the input element such that the input element , when in a rest position, has a fixed position relative to the housing , characterized in that the sensor device comprises at least six sensor units , wherein each of the at least six sensor units comprises: at least one one-dimensional magneto-resistive sensor , and at least one magnetic transmitter associated to this sensor ; each of the at least six sensor units detecting at least one component of the movement of the input element relative to the housing , and wherein the spring device comprises exactly one or two elastic mats . a housing ; an input element arranged in the housing , the input element having a first side and a second side opposite the first side ; and a sensor device ; wherein the input element is movable in six components relative to the housing, namely three displacements and three angular rotations in and about the three axes of a Cartesian coordinate system, respectively; wherein the sensor device detects the movement of the input element relative to the housing ; and wherein the first side or the second side or both sides together are configured such that a user can perform a movement of the input element along the six components by an action on the first side and/or the second side , and wherein the 3D input device comprises at least one spring device , the spring device being connected with the housing and the input element such that the input element , when in a rest position, has a fixed position relative to the housing , characterized in that the sensor device comprises at least six sensor units , wherein each of the at least six sensor units comprises: at least one one-dimensional magneto-resistive sensor , and at least one magnetic transmitter associated to this sensor ; each of the at least six sensor units detecting at least one component of the movement of the input element relative to the housing , and wherein the spring device comprises exactly one or two elastic mats . at least one one-dimensional magneto-resistive sensor , and at least one magnetic transmitter associated to this sensor ; each of the at least six sensor units detecting at least one component of the movement of the input element relative to the housing , and wherein the spring device comprises exactly one or two elastic mats . <EOS>