Bi doped lanthanum manganites with the chemical composition of La0.67-xBixCa0.33MnO3 (x = 0, 0.05, 0.1, 0.2) were prepared by the standard solid-state process. The Curie temperatures were measured to be 267 K for x = 0, 248 K for x = 0.05, 244 K for x = 0.1 and 229 K for x = 0.2 samples. It was found that the maximum value of the magnetic entropy change \Delta S-m\ has reached the highest value of 6.08 J/kg K at 3 T for the composition with x = 0.05. Nearly the same maximum entropy change was observed for the x = 0 sample. A large decrease in the magnitude of the entropy change was observed for the x = 0.2 sample. (C) 2006 Elsevier B.V. All rights reserved.