(BETS)2ClO4(TCE)0.5 and (BETS)2BF4(TCE)0.5 have a unique molecular arrangement based on BETS tetrad, named kappa(4x4) molecular arrangements, where BETS is bis(ethylenedithio)tetrathiafulvalene. (BETS)2(TEA)0.7InCl5 has a new distorted tetrad structure. On the other hand, (BETS)2InCl4 has a kappa(2x2) structure (more simply so-called kappa-type structure), The temperature dependences of the resistivities of (BETS) ClO4(TCE)0.5 and (BETS)2BF4(TCE)0.5 are metallic down to 4 K and that of (BETS)2(TEA)0.7InCl5 is weakly metallic down to about 100 K and becomes semiconducting at low The temperature dependence of the electrical resistivity of kappa-(BETS)2InCl4 has a characteristic flexion point at around 130 K.