The physical properties of organic superconductors under a magnetic field are advances in theories for phenomenology, the superconductivity transitions of BEDT-TTF salts and A3C60 are analyzed by taking account of fluctuation, and thereby the physical parameters are reevaluated, while (TMTSF)2X can be treated by an anisotropic effective mass tensor model. Other properties relevant to vortex dynamics and paramagnetic pair breaking effect are also mentioned.