The effect of basalt fibre (BF) with different length (24 and 50 mm) and content on the properties of concrete was studied in this article. A fracture properties of basalt fibre reinforced concrete were determined using a three-point bending loading test. It was established that incorporating basalt fibres into concrete improves the strength and deformability parameters of dispersed reinforced cement concrete. The flexural strength of concrete containing 24 mm basalt fibre increases by 7–19% compared to unreinforced concrete. The effectiveness of its use in the post-critical stage of concrete deformation is observed in all studied concretes. A positive effect of dispersed reinforcement with 50 mm basalt fibre on the compressive and flexural strength is also observed. Thus, the increase in compressive and flexural strength is 16–31% and 12–20%, respectively, compared to reference concrete. The configuration and area under the load-displacement diagrams of concretes indicate that dispersed reinforcement with basalt fibres significantly increases the work of fracture of concrete under bending. The fracture energy increases by 1.6 times. Therefore, dispersed reinforcement with basalt fibres is effective, since in both cases there is an increase in strength and crack resistance characteristics, and dispersed reinforced concretes fail in a less brittle manner.