This paper covers the experimental studies of Young’s modulus of concrete on the basis of eigenfrequencies. Experiments were performed on beam elements measuring 1050 × 200 × 100 mm, using operational modal analysis (OMA). Two types of concrete with different mixtures were tested. The dynamic Young’s modules were calculated on the basis on the resonant frequencies measured in two directions. The values obtained were compared with static Young’s modules determined on concrete cylinders in axial compression testing.