In the title compound, N,N'-Bis(salicylidene)-2-methyl-1,2-propanediaminato-nickel(II), [NiC18H18N2O2], (CCDC 235278), the Ni-II atom is coordinated by two iminic N and two phenolic 0 atoms of the N,N'Bis(salicylidene)-2-methyl-1,2-propanediaminate (SALPD(2-)) ligand. The geometry of the coordination sphere around the Ni atom is distorted square-planar. Ni(II) ion, forms crystals which belong to the orthorhombic system, space group P cab, with unit cell dimensions a=11.5531(1), b=15.985(4), c=17.418(1) angstrom, V=3210.5(9) angstrom(3). The cell contains eight molecules. The contact distance Ni...Ni-a between the neighbouring molecules is 4.4704(8) angstrom.