The geometries, stability and chemical bonding of XB_{6}^{+}(X=C, Si, Ge, Sn, Pb) clusters were investigated using *ab initio* (MP2) and density functional theory (DFT: B3LYP and B3PW91) methods. Analytical gradients with polarized split-valence basis sets (6-311+G(*d*)) were used for B, C, Si, and Ge. The relativistic effective core potential with the LANL2DZ basis sets were chosen for Sn and Pb. The results show that the C_{s} symmetric pseudo-planar XB_{6}^{+}(X=C, Si, Ge, Sn, Pb) structures are the global minima on the potential energy surfaces, which are more stable than the C_{6v} symmetric pyramidal and C_{2} symmetric quasi-pyramidal structures. We carried out a natural bond orbital (NBO) analysis of all these minima at the B3LYP level, and calculated and discussed the highest occupied molecular orbital and the lowest unoccupied molecular orbital (HOMO-LUMO) energy gaps, the molecular orbitals (MO), and the nucleus-independent chemical shifts (NICS) of the most stable structure. The nature of the X―B and B＝B bonds in these minimum structures and the aromatic characteristics (*σ* and *π*) of the most stable configuration were analyzed at the B3LYP level.