[en] The results are presented of the search for the anomalous transmission of ultracold neutrons (UCN) through beryllium (thickness ∼ 0.14 mm), stainless steel (0.05 and 0.015 mm) and copper (0.01 and 0.018 mm) foils. This anomalous transmission is considered as one of the possible reasons for UCN disappearance from beryllium bottles. No transmission was found in measurements at the level 10^-7 except for the case of copper foils which we attribute to the admixture in the UCN flux of neutrons with the energies higher than the boundary energy for copper