In the title compound, [CrCl(2)(C(3)H(10)N(2))(2)]ClO(4), the Cr(III) atom is coordinated equatorially by four N atoms of two propane-1,3-diamine (tn) ligands and axially by two mutually trans Cl atoms, thus displaying a slightly distorted octa-hedral geometry with no crystallographically imposed symmetry. The two six-membered chair chelate rings in the complex cation are in an anti conformation with respect to each other. The Cr-N bond lengths range from 2.0831 (18) to 2.0917 (19) Å, and the Cr-Cl bond lengths are 2.3148 (6) and 2.3135 (6) Å. The perchlorate anions have slightly distorted tetra-hedral geometries. Weak inter-molecular hydrogen bonds involving the tn ligand NH groups as donors, and chloride ligands and anion O atoms as acceptors are observed.