Method for manufacturing a formwork element for concrete structures, the formwork element having a base body of hollow profile construction with an outer side constituting a form lining, wherein the base body is formed of at least two interlocking sub-segments which are permanently connected to each other at mutually interlocking edge areas by means of a hooked connection formed in the area of the outer side and one inner side (14, 48) of the sub-segments, thereby constituting an inseparable unit, wherein the hooked connection extends over a large part of the entire length or over the entire length of the outer and inner sides (14; 48) of the base body, wherein the hooked connection has a locking groove in the area of the inner side of the base body, said locking groove being disposed on one sub-segment, and an inner wall section of the other sub-segment being captured therein, wherein the locking groove is partially covered by an inner wall leg of the sub-segment having that locking groove, the inner wall leg protruding parallel to the inner side of the base body, wherein the locking groove has a groove bottom, one end of which is disposed on a side wall of the sub-segment, and a groove flank angled towards the inner side of the base body, the profiled inner wall section of the other sub-segment having an offset edge area which engages below the inner wall leg, wherein a profiled strip is integrally formed with the profiled inner wall section, the profiled strip laterally protruding into the locking groove towards the groove bottom thereof seating over its full area on the groove flank in a locked position of the inner wall section, wherein in the area of the outer side of the base body, the hooked connection has a snap-on hook which is disposed on one sub-segment and is snapped into locked engagement with a locking element disposed on the other sub-segment, the method comprising the steps of: - inserting one intermediate segment with its offset edge area into the locking groove of the other sub-segment until the offset edge area is guided beneath the inner wall leg of the other sub-segment; followed by - establishing the hooked connection by pivoting one sub-segment relative to the other sub-segment under forced guidance of the offset edge area of the inner wall section in a hinge-like manner in the locking groove until the snap-on hook snaps into locked engagement with the locking element, and the offset edge area of the inner wall section of the sub-segment is brought into its locked position in which the profiled strip of the one sub-segment seats on the groove flank of the locking groove of the other sub-segment. - inserting one intermediate segment with its offset edge area into the locking groove of the other sub-segment until the offset edge area is guided beneath the inner wall leg of the other sub-segment; followed by - establishing the hooked connection by pivoting one sub-segment relative to the other sub-segment under forced guidance of the offset edge area of the inner wall section in a hinge-like manner in the locking groove until the snap-on hook snaps into locked engagement with the locking element, and the offset edge area of the inner wall section of the sub-segment is brought into its locked position in which the profiled strip of the one sub-segment seats on the groove flank of the locking groove of the other sub-segment.