The β-γ directional correlation function is expressed as a series in the Legendre polynomicals: (1) , where cL1L2(2n)'s are the numerical coefficients which depend upon the spin assignments of the nuclei and the multipolarities of γ-ray. Their numerical values are tabulated for the most interesting transition schemes. The parameters for the β-ray, bL1L2(2n), are also given in the convenient formulae to analyse the experimental data.