To determine the allelopathic effect of type and amount of cumin residues on growth and root morphology of chickpeas, an experiment was conducted in a factorial arrangement based on a randomized complete block design with three replications at Islamic Azad University, Sabzevar branch. Factors were residual type (seed, stem, and seed+stem ) and residual amount (0, 250, 500 and 750 g.m-2). The results showed that the increase in the amount of residue decreased stem length(18.96%), 7.40% in stem diameter, root length (41.25%), root dry weight (61.37%), shoot dry weight (51.25%), total root length (41.25%), root surface (31.74% ), root volume (69.25%), and root specific weight (37.77%). Seed+stem residues had the greatest inhibitory effect in all traits. Overall, roots were more sensitive than stems to cumin residues.