Handle device, in particular surgical-tool handle device, with a first handle element (11a; 11b; 11c; 11d) and a second handle element (12a; 12b; 12c; 12d), with a tool unit (25a; 25b; 25c; 25d) for a holding of a tool, and with a shear joint by means of which the two handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d) are connected pivotably and separably, and with a coupling unit (13a; 13b; 13c; 13d), which is configured to keep the two handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d) together counter to a separation direction and which comprises at least one coupling element (14a; 14b; 14c; 14d) that is configured to establish, depending on a relative position of the handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d), a form-fit connection of the handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d) counter to the separation direction, the at least one coupling element (14a; 14b; 14c; 14d) being embodied as a centering element (16a; 16b; 16c; 16d) for a centering of the form-fit connection, wherein the at least one coupling element (14a; 14b; 14c; 14d) comprises at least one region (18a; 18b) which has, in a first transverse direction (19a; 19b), a first extension and has, in a second transverse direction (20a; 20b), a second extension which is greater than the first extension, with at least one corresponding coupling element (15a; 15b; 15c; 15d), which delimits an at least partly circle-shaped recess (23a; 23b; 23c; 23d) for accommodating the coupling element (14a; 14b; 14c; 14d), wherein the coupling element (14a; 14b) and the corresponding coupling element (15a; 15b) are configured for establishing the form-fit connection via a translational movement in a plane at least substantially parallel to a rotary plane of the shear joint, characterized in that the coupling element (14a; 14b) comprises in a direction perpendicular to the first transverse direction (19a; 19b) and to the second transverse direction (20a; 20b), at an end piece, a flange protruding over the region (18a; 18b) and having a circle-shaped cross-section, wherein at an end piece of the coupling element (14a; 14b) that faces away from the flange, the coupling element (14a; 14b) comprises a plug-in pin, which is configured to be stuck into a corresponding bore of the first handle element (11a; 11b; 11c; 11d), the bore being realized in a centre of a rectangular milled-out portion of the first handle element (11a; 11b), the rectangular milled-out portion corresponding in its outer dimensions to a cross-section of the region (18a; 18b) of the coupling element (14a; 14b) with the transverse directions (19a; 19b; 20a; 20b), wherein the corresponding coupling element (15a; 15b; 15c; 15d) is embodied as a partial region of the second handle element (12a; 12b; 12c; 12d), which has the partly circle-shaped recess (23a; 23b; 23c; 23d). with a first handle element (11a; 11b; 11c; 11d) and a second handle element (12a; 12b; 12c; 12d), with a tool unit (25a; 25b; 25c; 25d) for a holding of a tool, and with a shear joint by means of which the two handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d) are connected pivotably and separably, and with a coupling unit (13a; 13b; 13c; 13d), which is configured to keep the two handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d) together counter to a separation direction and which comprises at least one coupling element (14a; 14b; 14c; 14d) that is configured to establish, depending on a relative position of the handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d), a form-fit connection of the handle elements (11a; 11b; 11c; 11d, 12a; 12b; 12c; 12d) counter to the separation direction, the at least one coupling element (14a; 14b; 14c; 14d) being embodied as a centering element (16a; 16b; 16c; 16d) for a centering of the form-fit connection, wherein the at least one coupling element (14a; 14b; 14c; 14d) comprises at least one region (18a; 18b) which has, in a first transverse direction (19a; 19b), a first extension and has, in a second transverse direction (20a; 20b), a second extension which is greater than the first extension, with at least one corresponding coupling element (15a; 15b; 15c; 15d), which delimits an at least partly circle-shaped recess (23a; 23b; 23c; 23d) for accommodating the coupling element (14a; 14b; 14c; 14d), wherein the coupling element (14a; 14b) and the corresponding coupling element (15a; 15b) are configured for establishing the form-fit connection via a translational movement in a plane at least substantially parallel to a rotary plane of the shear joint, characterized in that the coupling element (14a; 14b) comprises in a direction perpendicular to the first transverse direction (19a; 19b) and to the second transverse direction (20a; 20b), at an end piece, a flange protruding over the region (18a; 18b) and having a circle-shaped cross-section, wherein at an end piece of the coupling element (14a; 14b) that faces away from the flange, the coupling element (14a; 14b) comprises a plug-in pin, which is configured to be stuck into a corresponding bore of the first handle element (11a; 11b; 11c; 11d), the bore being realized in a centre of a rectangular milled-out portion of the first handle element (11a; 11b), the rectangular milled-out portion corresponding in its outer dimensions to a cross-section of the region (18a; 18b) of the coupling element (14a; 14b) with the transverse directions (19a; 19b; 20a; 20b), wherein the corresponding coupling element (15a; 15b; 15c; 15d) is embodied as a partial region of the second handle element (12a; 12b; 12c; 12d), which has the partly circle-shaped recess (23a; 23b; 23c; 23d).