[en] Magnetic shielding has been a key factor in the measurement of ultra-weak magnetic fields, especially for shielding from low frequency electromagnetic noise. With the recent development of superconducting quantum interference devices, superconducting magnetic shielding has become an important area of research. MgB₂ has shown great potential in magnetic shielding for its remarkable superconducting properties, the feasibility of its use in this capacity having been demonstrated by MgB₂ bulk samples. However, the potential for application of such bulk samples is limited. In this work, we have investigated the possibility of the fabrication of MgB₂ films on three-dimensional (3D) structures using a hybrid physical−chemical vapor deposition system. MgB₂ films 10 μm thick have been fabricated on the outer surface of a polycrystalline Al₂O₃ cylinder. The deposited film showed a transition temperature (T_C) of 39 K and J _C of 5.1 × 10⁵ A · cm⁻², which are comparable to those of planar MgB₂ films. This work shows the feasibility of depositing MgB₂ films onto a 3D structure, and sheds light on the potential use of MgB₂ films in superconducting magnetic shielding. (paper)