In continuation of the previous work on silver(II) complexes of pyridine mono- and dicarboxylic acids it has now been possible to prepare the argentic complexes of some of the pyridine tricarboxylic acids, namely pyridine-2 :3:6-, -2:4:5, and -2 :4 :6-carboxylic acids. Argentic complexes of all the three acids were obtained by the persulphate oxidation of silver nitrate in presence of the acid concerned. The argentic complex of pyridine-2 :3 :6-tricarboxylic arid forms a very unstable green compound. Pyridine-2 :4 :6-tricarboxylic acid gave two differently colou­red complex salts, one chocolate and the other black, whereas the colour of argentic complex of pyri­dine -2 :4 :5-tricarboxylic acid is orange. The properties of these complexes are more or less similar to those of the mono- and dicarboxylic acid complexes. These are possibly represented by monomeric structure like that of argentic picolinate. X-ray powder photographs show that the black and chocolate modifications of the argentic complex of collidinic acid (2 :4 :6-acid) differ in their crystal stracturd. A consideration of the properties of the argentic complexes of pyridine mono-, di- and tri-carboxylic acids indicates that the order of their sta­bility can be represented as follows : Complex (mono)> Complex (di) > Complex (tri).