Abstarct: In this study, the effect of micro-nano bubbles (MNB) on mechanical properties of concrete were investigated. Experiments were performed with a mixture of water-cement ratio of 0.6. All experiments were carried out on triplieate samples and the results were compared with the control samples. According to tests, the micro-nano air bubbles in the concrete increase the compressive, tensile, and flexural strength of concrete. The resolts showed that the hydration temperature as well the initial and final setting time of cement mix with water containing MNB was reduced. The concrete made with MNB has lower slump than the ordinary concrete. The results obtained in this study showed that the mechanical propertiese of concrete made with MNB is similar to concrete contain other nano particles while has shown different with the concrete made with plasticizers.