Spinneret unit, in particular for producing a multi-channel membrane, - with at least one extrusion unit (26a; 26b; 26c) forming at least one extrusion space (28a; 28b; 28c) for conducting a polymer solution, and - with at least one internal-fluid feeding-in unit (30a; 30b; 30c) comprising at least two channels (32, 34, 36) for conducting an internal fluid, which are arranged inside the extrusion space (30a; 30b; 30c), - wherein the internal-fluid feeding-in unit (30a; 30b; 30c) comprises at least one support element (38a; 38b, 40b, 42b; 38c, 40c, 42c) which is arranged inside the extrusion space (28a; 28b; 28c), - wherein the internal-fluid feeding-in unit (30a; 30b; 30c) comprises at least one internal fluid exit opening (48a, 50a, 52a; 48b, 50b, 52b; 48c, 50c, 52c), which is arranged inside the extrusion space (28a; 28b; 28c), - wherein the extrusion unit (26a; 26b; 26c) comprises at least one polymer solution feed (44a; 44b) and the at least one support element (38a; 38b, 40b, 42b; 38c, 40c, 42c) is arranged in an extrusion direction (46a; 46b; 46c) downstream of the polymer solution feed (44a; 44b), - wherein the extrusion unit comprises at least one polymer solution exit opening and the support element comprises at least one pass-through opening, which is configured to fluidically connect the polymer solution feed and the polymer solution exit opening, - wherein the at least one support element (38b, 40b, 42b; 38c, 40c, 42c) is embodied in the shape of a bar, - wherein the extrusion space (28a; 28b; 28c) is embodied at least partly in a funnel shape, - wherein the polymer solution leaves the spinneret unit byf the polymer solution exit opening, characterised in that all the internal fluid exit openings (48a, 50a, 52a) are arranged in the extrusion direction upstream of the polymer solution exit opening and that all the internal fluid exit openings (48a, 50a, 52a) are arranged inside the funnel-shaped polymer solution drainage space. - with at least one extrusion unit (26a; 26b; 26c) forming at least one extrusion space (28a; 28b; 28c) for conducting a polymer solution, and - with at least one internal-fluid feeding-in unit (30a; 30b; 30c) comprising at least two channels (32, 34, 36) for conducting an internal fluid, which are arranged inside the extrusion space (30a; 30b; 30c), - wherein the internal-fluid feeding-in unit (30a; 30b; 30c) comprises at least one support element (38a; 38b, 40b, 42b; 38c, 40c, 42c) which is arranged inside the extrusion space (28a; 28b; 28c), - wherein the internal-fluid feeding-in unit (30a; 30b; 30c) comprises at least one internal fluid exit opening (48a, 50a, 52a; 48b, 50b, 52b; 48c, 50c, 52c), which is arranged inside the extrusion space (28a; 28b; 28c), - wherein the extrusion unit (26a; 26b; 26c) comprises at least one polymer solution feed (44a; 44b) and the at least one support element (38a; 38b, 40b, 42b; 38c, 40c, 42c) is arranged in an extrusion direction (46a; 46b; 46c) downstream of the polymer solution feed (44a; 44b), - wherein the extrusion unit comprises at least one polymer solution exit opening and the support element comprises at least one pass-through opening, which is configured to fluidically connect the polymer solution feed and the polymer solution exit opening, - wherein the at least one support element (38b, 40b, 42b; 38c, 40c, 42c) is embodied in the shape of a bar, - wherein the extrusion space (28a; 28b; 28c) is embodied at least partly in a funnel shape, - wherein the polymer solution leaves the spinneret unit byf the polymer solution exit opening,