A new cynao-bridged Sm-III-Fe-III. bimetallic coordination olymer has been prepared by the reaction of (n-Bu4N)(3)Fe(CN)(6) and Sm(NO3)(3) center dot 6H(2)O in a DMF-H2O media. The complex consists of alternate Sm(DMF)(4)(H2O)(2) and Fe(CN)(6) units bridged by two cis-cyano ligands to form a zigzag chain. It behaves as a molecule-based magnet with T-c = 3.4 K. At 2 K, hysteresis was observed with a coercive field of 200 Oe.