Cargo carrier for being received into the cargo region of an aircraft, having a bottom element with a bearing side which is arranged on the cargo carrier in such a way that the cargo carrier can bear on a bottom surface of a cargo region of an aircraft so that the bearing surface is situated opposite the bottom surface, wherein the cargo carrier is configured in such a way as to be moved over the bottom surface, which extends in a bottom plane, so that the bearing side faces towards the bottom surface, wherein the bottom element has a base surface which is arranged on that side of the bottom element which faces away from the bearing side, wherein the bearing side is provided with a multiplicity of rolling elements, wherein each of the rolling elements is held on a holder so as to be rotatable about an axis of rotation, wherein each of the holders is displaceable between an extended position and a retracted position, wherein the distance of the rolling elements from the base surface in the extended position is greater than in the retracted position, wherein, when the holders are in the extended position, the axes of rotation of the rolling elements are arranged in a common axis-of-rotation plane, wherein the rolling elements are held on the bottom element in such a way that the axis of rotation of each of the rolling elements is rotatable about a vertical axis, wherein the vertical axis extends so as to be spaced apart in a parallel manner from an axis extending through the axis of rotation of the rolling element and extending perpendicularly to the axis-of-rotation plane, wherein the multiplicity of rolling elements comprises multiple groups of rolling elements, wherein the holders holding the rolling elements of a first one of the groups are held on the bottom element along a rectilinearly extending first line so as to be displaceable between the retracted position and the extended position, wherein the first line extends parallel to the axis-of-rotation plane, characterized in that each of the holders holding the rolling elements of the first groups has an engagement surface which extends in a manner inclined at an angle of less than 90° to the vertical axis, wherein provision is made of an actuating rod extending along the first line and having counterpart surfaces which are situated opposite the inclined engagement surfaces and which bear areally against the engagement surfaces, and the actuating rod is held in the bottom element so as to be displaceable along the first line, such that the actuating rod is displaceable between a pushed-in position and a pulled-out position, wherein a displacement of the actuating rod from the pushed-in position into the pulled-out position causes the holders holding the rolling elements of the first group to be displaced from the retracted position into the extended position. wherein the cargo carrier is configured in such a way as to be moved over the bottom surface, which extends in a bottom plane, so that the bearing side faces towards the bottom surface, wherein the bottom element has a base surface which is arranged on that side of the bottom element which faces away from the bearing side, wherein the bearing side is provided with a multiplicity of rolling elements, wherein each of the rolling elements is held on a holder so as to be rotatable about an axis of rotation, wherein each of the holders is displaceable between an extended position and a retracted position, wherein the distance of the rolling elements from the base surface in the extended position is greater than in the retracted position, wherein, when the holders are in the extended position, the axes of rotation of the rolling elements are arranged in a common axis-of-rotation plane, wherein the rolling elements are held on the bottom element in such a way that the axis of rotation of each of the rolling elements is rotatable about a vertical axis, wherein the vertical axis extends so as to be spaced apart in a parallel manner from an axis extending through the axis of rotation of the rolling element and extending perpendicularly to the axis-of-rotation plane, wherein the multiplicity of rolling elements comprises multiple groups of rolling elements, wherein the holders holding the rolling elements of a first one of the groups are held on the bottom element along a rectilinearly extending first line so as to be displaceable between the retracted position and the extended position, wherein the first line extends parallel to the axis-of-rotation plane, characterized in that each of the holders holding the rolling elements of the first groups has an engagement surface which extends in a manner inclined at an angle of less than 90° to the vertical axis, wherein provision is made of an actuating rod extending along the first line and having counterpart surfaces which are situated opposite the inclined engagement surfaces and which bear areally against the engagement surfaces, and the actuating rod is held in the bottom element so as to be displaceable along the first line, such that the actuating rod is displaceable between a pushed-in position and a pulled-out position, wherein a displacement of the actuating rod from the pushed-in position into the pulled-out position causes the holders holding the rolling elements of the first group to be displaced from the retracted position into the extended position.