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We present the space spectrometer PAMELA observations of proton and heliumfluxes during the December 13 and 14, 2006 solar particle events. This is thefirst direct measurement of the solar energetic particles in space with asingle instrument in the energy range from $\sim$ 80 MeV/n up to $\sim$ 3GeV/n. In the event of December 13 measured energy spectra of solar protons andhelium were compared with results obtained by neutron monitors and otherdetectors. Our measurements show a spectral behaviour different from thosederived from the neutron monitor network. No satisfactory analytical fittingwas found for the energy spectra. During the first hours of the December 13event solar energetic particles spectra were close to the exponential formdemonstrating rather significant temporal evolution. Solar He with energy up to~1 GeV/n was recorded on December 13. In the event of December 14 energy ofsolar protons reached ~600 MeV whereas maximum energy of He was below 100MeV/n. The spectra were slightly bended in the lower energy range and preservedtheir form during the second event. Difference in the particle flux appearanceand temporal evolution in these two events may argue for a special conditionsleading to acceleration of solar particles up to relativistic energies.

Observations of the December 13 and 14, 2006, Solar Particle Events in the 80 MeV/n - 3 GeV/n range from space with PAMELA detector