A method for producing spacers for concrete reinforcements and concrete structures, comprising: (a) providing at least four parallel longitudinal bars (6, 7, 7') in a plane, comprising - two peripheral longitudinal bars; and - at least one punching groove consisting of a pair of mutually adjacent longitudinal bars (7, 7'), positioned between said peripheral longitudinal bars; (b) placing transverse bars (4, 4') perpendicularly on and/or under the longitudinal bars, and fastening the transverse bars to the longitudinal bars, so that a lattice structure is produced; (c) optionally, cutting off any part of the transverse bars overhanging the peripheral longitudinal bars; (d) cutting through or punching out of the transverse bar portions between the mutually adjacent longitudinal bars (7, 7') of the punching groove, optionally except for two to five of these transverse bar portions; thus producing two or more elongate lattices, optionally connected to each other by means of two to five uninterrupted transverse bars; and (e) bending the two or more elongate lattices; in this case producing two or more spacers for concrete reinforcements and/or concrete structures, each comprising two parallel and identical meandering longitudinal bars (2, 3), connected to each other by transverse bars (4, 4') which are perpendicular to and laterally connected to the longitudinal bars; in which the transverse bars do not project or project by no more than 0.5 mm over the top and bottom longitudinal bars; and in which the spacers are optionally connected to each other by means of two to five uninterrupted transverse bars. (a) providing at least four parallel longitudinal bars (6, 7, 7') in a plane, comprising - two peripheral longitudinal bars; and - at least one punching groove consisting of a pair of mutually adjacent longitudinal bars (7, 7'), positioned between said peripheral longitudinal bars; - two peripheral longitudinal bars; and - at least one punching groove consisting of a pair of mutually adjacent longitudinal bars (7, 7'), positioned between said peripheral longitudinal bars; (b) placing transverse bars (4, 4') perpendicularly on and/or under the longitudinal bars, and fastening the transverse bars to the longitudinal bars, so that a lattice structure is produced; (c) optionally, cutting off any part of the transverse bars overhanging the peripheral longitudinal bars; (d) cutting through or punching out of the transverse bar portions between the mutually adjacent longitudinal bars (7, 7') of the punching groove, optionally except for two to five of these transverse bar portions; thus producing two or more elongate lattices, optionally connected to each other by means of two to five uninterrupted transverse bars; and (e) bending the two or more elongate lattices; in this case producing two or more spacers for concrete reinforcements and/or concrete structures, each comprising two parallel and identical meandering longitudinal bars (2, 3), connected to each other by transverse bars (4, 4') which are perpendicular to and laterally connected to the longitudinal bars; in which the transverse bars do not project or project by no more than 0.5 mm over the top and bottom longitudinal bars; and in which the spacers are optionally connected to each other by means of two to five uninterrupted transverse bars.