The 15N(7Li, 7Be)15C reaction at 55MeV incident energy was studied at forward angles in order to explore the 15C excitation energy spectrum. The 15C groundstate and the states at Ex = 0.77, 6.77, 7.30, 8.50MeV excitation energies were populated. The energy resolution (∼ 250 keV) allowedthe identification of these transitions each for 7Be groundand first-excitedstate at Ex = 0.429MeV. QRPA calculations reproduce the 15C level structure below 1.5MeV excitation energy. The strength observedat higher excitation energies probably arises from core-excitedcomp onents of 15C.