A triple helicate, a macrocyclic aromatic amide with a helical structure, is complexed with La(III) ion leading to the self-assembly of a helical coordination polymer. Each La(III) atom is coordinated by a pair of oxygen of the tertiary benzenetrianifide moieties from two adjacent ligands, resulting in the formation of chiral infinite coordination networks of alternating La(III) atoms and ligands. Here, we demonstrate that the chirality of a one-dimensional polymeric structure in the crystal was derived from T-shaped aromatic-aromatic (CH-pi) interactions of each molecule twisted in the same direction.