Method for producing a hollow fibre module (1, 1'), in which in a first step a hollow fibre bundle is inserted into a module housing (2, 2') and at least one end of the module housing (2, 2') is closed by a cap, in which in a second step a liquid first component, which forms a spacer and which can adopt a solid state, is introduced via first inlet into an intermediate space arranged between the hollow fibre ends (6, 7) and the cap, wherein the hollow fibre ends (6, 7) enter the first component, and in which in a third step a liquid, hardenable second component is deposited, directed away from the cap, in front of the first component via a second inlet, wherein the second component in the hardened state forms a sealing layer which embeds the hollow fibre bundle and seals it relative to the adjacent module housing wall (29, 29'), characterised in that - the cap is constructed as a removable sprue cover (18, 18', 18") with an encircling collar (19, 19', 19"), which is insertable into a free end (13, 13') of the module housing (2, 2') and which in the inserted state receives the free hollow fibre ends of the hollow fibre bundle, wherein the collar (19, 19', 19") is closed by an end wall at the end thereof remote from the hollow fibre bundle wherein the sprue cover (18, 18', 18") has the first inlet for the first liquid component and wherein the encircling collar (19, 19', 19") has on the inner surface (20, 20', 20") thereof facing the hollow fibre bundle a profiling or resistance elements (22, 23), which forms or form together with the first component after solidification thereof a mechanically positive connection so that a plug formed in the sprue cover cannot rotate relative to the sprue cover (18, 18', 18"), and - after hardening of the second component the cap inclusive of the first component forming the solidified plug and the hollow fibre ends, which are embedded in the plug and protrude from the end surface of the layer formed by the second component, is removed from the module housing (2, 2') in a rotating, pulling motion, wherein when the sprue cover (18, 18', 18") is removed the hollow fibres in the boundary layer formed by the first component and the second component are severed. - the cap is constructed as a removable sprue cover (18, 18', 18") with an encircling collar (19, 19', 19"), which is insertable into a free end (13, 13') of the module housing (2, 2') and which in the inserted state receives the free hollow fibre ends of the hollow fibre bundle, wherein the collar (19, 19', 19") is closed by an end wall at the end thereof remote from the hollow fibre bundle wherein the sprue cover (18, 18', 18") has the first inlet for the first liquid component and wherein the encircling collar (19, 19', 19") has on the inner surface (20, 20', 20") thereof facing the hollow fibre bundle a profiling or resistance elements (22, 23), which forms or form together with the first component after solidification thereof a mechanically positive connection so that a plug formed in the sprue cover cannot rotate relative to the sprue cover (18, 18', 18"), and - after hardening of the second component the cap inclusive of the first component forming the solidified plug and the hollow fibre ends, which are embedded in the plug and protrude from the end surface of the layer formed by the second component, is removed from the module housing (2, 2') in a rotating, pulling motion, wherein when the sprue cover (18, 18', 18") is removed the hollow fibres in the boundary layer formed by the first component and the second component are severed.