C10H7+, C10H6+ and C10H5+ have been detected as a result of multiphoton deprotonation of the naphthalene ion. Both ion formation and deprotonation were induced by the interaction of 266 nm laser radiation in the energy range from 0 up to 7mJ and using different carrier gases. At energies per pulse lower than 3 mJ the results show that the mechanisms responsible the lost of two hydrogen atoms are sequential (-H, -H) or concerted (-H2). At higher energies the lost of a third hydrogen atom was also observed. From the measured ion currents as a function of the laser intensity, the number of absorbed photons and the cross sections were calculated. The effect of the carrier gases was also investigated.