Body support device to support at least one part of the human body, in particular when lifting and/or carrying loads, comprising at least a first body fastening element fixable above a human's hip joint, at least a second body fastening element mechanically fixable below a human's hip joint and merely on the back side at least one elastic means, which mechanically connects the first body fastening element and the second body fastening element on the back side of the human body with each other, wherein the elastic means is adapted to be tensioned when a person mechanically linked to the body support device is bending down and to apply an erecting force to the person when the person is bent down, wherein the body support device comprises a biasing device for adjusting the length of the elastic means between the respective fixations on the first body fastening element and the second body fastening element and wherein the biasing device comprises a pivotable mounted eccentric element adapted to apply a compressive force on the elastic means and a counterpressure surface wherein the counterpressure surface is arranged essentially perpendicularly to the rotation plane of the eccentric element and is adapted to apply a counter compressive force on the elastic means essentially in the opposite direction of the compressive force and characterized in that at least in an angular position of the eccentric element in which the distance between the circumference of the eccentric element and the counterpressure surface is at least the same as the thickness of a portion of the elastic means being arranged between the counterpressure surface and the eccentric element a section of the circumference of the eccentric element facing away from a portion of the elastic means that is tensile-loaded or tensile-loadable when a person mechanically linked to the body support device is bending down has a bigger radius than a section of the circumference of the eccentric element facing the portion of the elastic means that is tensile-loaded or tensile-loadable when a person mechanically linked to the body support device is bending down. wherein the body support device comprises a biasing device for adjusting the length of the elastic means between the respective fixations on the first body fastening element and the second body fastening element and wherein the biasing device comprises a pivotable mounted eccentric element adapted to apply a compressive force on the elastic means and a counterpressure surface wherein the counterpressure surface is arranged essentially perpendicularly to the rotation plane of the eccentric element and is adapted to apply a counter compressive force on the elastic means essentially in the opposite direction of the compressive force and characterized in that at least in an angular position of the eccentric element in which the distance between the circumference of the eccentric element and the counterpressure surface is at least the same as the thickness of a portion of the elastic means being arranged between the counterpressure surface and the eccentric element a section of the circumference of the eccentric element facing away from a portion of the elastic means that is tensile-loaded or tensile-loadable when a person mechanically linked to the body support device is bending down has a bigger radius than a section of the circumference of the eccentric element facing the portion of the elastic means that is tensile-loaded or tensile-loadable when a person mechanically linked to the body support device is bending down.