The article introduces the readers a joint research between AIST Chubu and IMR Tohoku University on the structure and size-dependent stability of group-14 clusters by means of surface induced dissociation (SID) experiments and theoretical calculations. So far, we have investigated on tin clusters and found that the fragmentation patterns and predicted structures are similar to those of Si and Ge clusters than those of Pb clusters, which is in contrast to similarities and differences in the bulk crystal structures of these elements.