Irradiation studies on H-charged Y-Ba-Cu-O films were performed for the first time. Samples, produced by laser ablation, were charged by H and irradiated successively at low temperature with 7 MeV15N ions.In situresistivity measurements were carried out below 100 K after each irradiation step. To determine the H concentration the nuclear reaction1H(15N, αγ)12C was used. For all samples (with different H concentration) an almost linear correlation between fluence and decrease of the critical temperature (Tc) was found. Changes inTcwith increasing H-concentration show, that H makes Y-Ba-Cu-O superconductor films more sensitive to heavy ion irradiation.