In this paper, the effects of flexibility of the elastic end restraints on the effective length coefficient of prismatic columns are investigated. The proposed method is based on the exact solution of the differential equation governing the column under the axial load. In the meantime, it will be consider of the Euler-Bernoulli beam theory. Moreover, the flexibility of the elastic supports of the column with rotational and translational linear springs is modeled. In the following, with finding the deformation of column and the entering of the general boundary conditions, the matrix of constant coefficients is assembled. By setting the determinant of this matrix to zero, the effective length coefficient of the column with various boundary conditions will be available. On this basis, firstly, the verification of the proposed correlation responses is made with other research texts. Subsequently, the effect of various end restraints on the effective length coefficient of the column is widely evaluated. The results show the effect of the flexibility of the column on the effective length coefficient of the column are significant.