Lung cancer, also known as lung carcinoma, is a malignant lung tumor characterized by uncontrolled cell growth in tissues of the lung. Worldwide in 2012, lung cancer occurred in 1.8 million people and resulted in 1.6 million deaths. This makes it the most common cause of cancer-related death in men and the second most common in women after breast cancer. Literature shows how it is difficult to find a proper diagnostic and treatment technique for this problem, especially in an early-stage phase. CT-guided needle aspiration, surgical resection, and bronchoscopy are used for lung cancer treatment, all show encouraging results for the diagnosis and treatment of lung cancer but also limitations and complications. In the past decade, innovations were introduced for bronchoscopy in order to approach, diagnose, and treat the pulmonary lesions in the peripheral areas of the bronchi. Among these, electromagnetic navigation bronchoscopy shows impressive accuracy results in the diagnosis and treatment of these peripheral lesions, but many complications and challenges are present. These complications are mainly associated with the long learning curve for trainers and the slow process of implementing new innovative instruments that could improve the technique. These challenges could be linked with the unavailability of a proper medical real-life model that could mimic both the complex geometrical structure and the physical characteristics of the bronchial tree and lung tissue and could be used as a testing and training environment. For this reason, the main objective of this research is to create a lung model that mimics both the geometrical and mechanical properties of the lung and bronchial tree. The medical phantom was created using additive manufacturing (3D printing) as production technique and polyvinyl alcohol hydrogel as production material. The research approach for this project involved the definition and validation of two main design criteria: mechanical and geometrical. The mechanical criterion was evaluated by preparing and testing different configurations of PVA hydrogels, created via freeze-thawing cycles process, and then compared the mechanical properties of the hydrogel, in particular, the elastic Young Modulus, with data from literature reporting lung tissue elasticity. The geometrical criterion was evaluated by creating a 3D model from CT scans and inspect this model with a bronchoscope and endoscope to identify similarity with real lung anatomy. The analysis of results produced with the experiments confirms the behavior of PVA hydrogel as a biomaterial that could mimic the mechanical properties of organic tissues. In particular, the results confirm the correlation of the mechanical properties of the hydrogel with the number of freeze-thaw cycles and the molecular weight of PVA powder in the solution, as already stated in the literature. In addition to that, a specific hydrogel configuration, with 10wt% of PVA and after four freeze-thaw cycles, was identified as a valuable mimicking material for lung tissue, where the values of the elastic module of the hydrogel match the bronchial tree and lung tissue on different strain levels. Furthermore, the inspection with the bronchoscope shows a similarity between the geometry of the model and the anatomy of the lungs, although just a qualitative analysis was done for validation of the geometrical criterion. Overall, the research goal of this project was satisfied, and the final prototype tested with successfull results. However, this is the first 3D printed lung model created with biomaterials, and different limitations are present.