A gripper for gripping a pipe, - comprising a plurality of gripping bodies and holding devices, each holding device being, when the gripper is in use, fastened to one of the gripping bodies with a respective connection arrangement in an operation position relative to the respective gripping body, - the gripper further comprising a plurality of pipe contacting elements, each holding device holding, when the gripper is in use, at least one of the pipe contacting elements, - the gripper being adapted to move the gripping bodies in relation to each other so as to grip a pipe, whereby the pipe contacting elements are in contact with the pipe, or so as to release to the pipe, wherein the connection arrangements are adapted to be maneuvered so as to release the respective holding device from the operation position so as for the holding device to assume a service position in which it is displaced from the operation position and held by the respective gripping body; characterized in that - each connection arrangement comprises an elongated fixing device, and a sleeve into which the fixing device is inserted, the fixing device being inserted through an aperture in the holding device and fixed to the gripping body, - the fixing device presents a first flange, the sleeve being adapted to bear against the first flange so as to axially restrict the movement of the sleeve, - one of the sleeve and the holding device presents a first abutment surface, and the other of the sleeve and the holding device presents a second abutment surface and a third abutment surface, the second abutment surface and the third abutment surface being mutually displaced in the axial direction and in the circumferential direction of the sleeve, - the first abutment surface is adapted to abut, upon the sleeve assuming a first angular position in relation to the holding device, against the second abutment surface whereby the holding device is locked in the operation position, and - the first abutment surface is adapted to abut, when the sleeve is turned so as to assume a second angular position, against the third abutment surface whereby the holding device can be moved into the service position. - comprising a plurality of gripping bodies and holding devices, each holding device being, when the gripper is in use, fastened to one of the gripping bodies with a respective connection arrangement in an operation position relative to the respective gripping body, - the gripper further comprising a plurality of pipe contacting elements, each holding device holding, when the gripper is in use, at least one of the pipe contacting elements, - the gripper being adapted to move the gripping bodies in relation to each other so as to grip a pipe, whereby the pipe contacting elements are in contact with the pipe, or so as to release to the pipe, wherein the connection arrangements are adapted to be maneuvered so as to release the respective holding device from the operation position so as for the holding device to assume a service position in which it is displaced from the operation position and held by the respective gripping body; characterized in that - each connection arrangement comprises an elongated fixing device, and a sleeve into which the fixing device is inserted, the fixing device being inserted through an aperture in the holding device and fixed to the gripping body, - the fixing device presents a first flange, the sleeve being adapted to bear against the first flange so as to axially restrict the movement of the sleeve, - one of the sleeve and the holding device presents a first abutment surface, and the other of the sleeve and the holding device presents a second abutment surface and a third abutment surface, the second abutment surface and the third abutment surface being mutually displaced in the axial direction and in the circumferential direction of the sleeve, - the first abutment surface is adapted to abut, upon the sleeve assuming a first angular position in relation to the holding device, against the second abutment surface whereby the holding device is locked in the operation position, and - the first abutment surface is adapted to abut, when the sleeve is turned so as to assume a second angular position, against the third abutment surface whereby the holding device can be moved into the service position.