  The structure of mirror $^{14}$C and $^{14}$O nuclei has been studied in the
framework of the five-particle model (three $\alpha$-particles and two
nucleons). Interaction potentials are proposed, which allowed the energy and
radius of $^{14}$C nucleus, as well as the energy of $^{14}$O one, to agree
with experimental data. On the basis of the variational approach with the use
of Gaussian bases, the energies and wave functions for five-particle systems
under consideration are calculated. The charge radius of $^{14}$O nucleus, as
well as the charge density distributions and the form factors for both nuclei,
are predicted.
