A torque wrench comprising a ratchet and a drive for the ratchet, wherein the ratchet includes a ratchet housing comprising two mutually opposite side walls which have a specified distance to each other and are connected to each other, a through opening extending transversely through the two side walls, which is designed to receive a ratchet rotary body, wherein its axis of rotation is parallel to the axis of the through opening, and comprising fastening means (17, 22, 23) for fastening a supporting device to the torque wrench, by means of which the torque wrench can be supported perpendicularly to the axis of rotation of the ratchet rotary body, wherein the fastening means (17, 22, 23) include a free space located between the side walls, which is designed to receive a fastening portion of the supporting device, and wherein the fastening means (17, 22, 23) include devices (22, 23) for fastening the fastening portion in the free space, wherein the free space is accessible from outside the torque wrench when the side walls are connected to each other, wherein the outer circumferential edges of the two mutually opposite side walls are connected to each other by means of a rim wall and the access opening to the free space is arranged in this rim wall and adapted for the fastening portion of the supporting device to be introduced through said opening and into the free space, and the fastening means (17, 22, 23) include devices (22, 23) for releasably fastening the fastening portion in the free space, wherein a bore (22, 22a) extends transversely through the two side walls and the free space, which bore is designed to receive a bolt for fastening the fastening portion of the supporting device, and wherein the fastening portion of the supporting device includes a bore which likewise is designed to receive the bolt and which is aligned with the bores in the side walls of the ratchet housing, characterized in that the alignment is achieved when either the fastening portion in the free space rests against its walls or the supporting device rests against the rim wall of the ratchet housing. two mutually opposite side walls which have a specified distance to each other and are connected to each other, a through opening extending transversely through the two side walls, which is designed to receive a ratchet rotary body, wherein its axis of rotation is parallel to the axis of the through opening, and comprising fastening means (17, 22, 23) for fastening a supporting device to the torque wrench, by means of which the torque wrench can be supported perpendicularly to the axis of rotation of the ratchet rotary body, wherein the fastening means (17, 22, 23) include a free space located between the side walls, which is designed to receive a fastening portion of the supporting device, and wherein the fastening means (17, 22, 23) include devices (22, 23) for fastening the fastening portion in the free space, wherein the free space is accessible from outside the torque wrench when the side walls are connected to each other, wherein the outer circumferential edges of the two mutually opposite side walls are connected to each other by means of a rim wall and the access opening to the free space is arranged in this rim wall and adapted for the fastening portion of the supporting device to be introduced through said opening and into the free space, and the fastening means (17, 22, 23) include devices (22, 23) for releasably fastening the fastening portion in the free space, wherein a bore (22, 22a) extends transversely through the two side walls and the free space, which bore is designed to receive a bolt for fastening the fastening portion of the supporting device, and wherein the fastening portion of the supporting device includes a bore which likewise is designed to receive the bolt and which is aligned with the bores in the side walls of the ratchet housing, characterized in that the alignment is achieved when either the fastening portion in the free space rests against its walls or the supporting device rests against the rim wall of the ratchet housing.