In the mononuclear title complex, [Pt(CH(3))Cl(C(25)H(23)N(2)P)], the N-benzyl-N-(diphenyl-phosphanylmeth-yl)pyridin-2-amine functions as a bidentate ligand with the pyridyl N atom and the phosphine P atom chelating the Pt(II) ion, forming a six-membered metallocycle. The Pt(II) atom adopts a square-planar coordination geometry with one methyl group and one chloride ligand bonding to the metal center in a cis relationship. C-H⋯π and C-H⋯Cl inter-actions help to consolidate the packing.