We have prepared new organic anionic acceptors, Br 2 XQNHCH 2 SO 3 − (2: X=Br, 3: X=Br y Cl 1− y (y≈0.5), 4: X=Cl; Q=1,4-benzoquinone), that possess both an electron acceptor part (1,4-benzoquinone) and an anionic part (sulfonate). The reduction potentials of the PPh 4 salts of 2, 3 and 4 are −0.45, −0.45 and −0.46V (vs. SCE in CH 3 CN), respectively. The results indicate that they are weaker acceptors than chloranil (−0.13V) and bromanil (−0.12V). Each anionic acceptor (AA) provided two BEDT-TTF salts, β-(ET) 5 (AA) 2 ·DCE·zH 2 O and λ-(ET) 2 (AA)·CH 3 OH (AA=2, 3, or 4; z=2: 0.97, 3: 0.83 and 4: 0.40). The structures and transport properties of the salts are reported.