The effect of gradual replacement of La atoms for Ce atoms in an antiferromagnetic dense Kondo compound Ce 2 Cu 2 In was studied by means of X-ray diffraction, magnetic susceptibility, heat capacity and electrical resistivity measurements, performed in wide range of temperature and magnetic field strength. The entire solid solution Ce 2− x La x Cu 2 In (0⩽x⩽2) retains the tetragonal Mo 2 FeB 2 -type crystal structure of the terminal compounds Ce 2 Cu 2 In and La 2 Cu 2 In, and only moderate and slightly anisotropic increase in the lattice parameters occurs. With raising the La-content, the antiferromagnetic phase transition shifts to lower temperatures in a linear manner and disappears in the vicinity of x=1.8. The magnetic order suppression in Ce 2− x La x Cu 2 In occurs due to “classical” magnetic dilution and involves a phase region with predominant short-range interactions.