The main objective of this study is to investigate the behaviours of ultrasonic pulse velocity through steel fiber reinforced cement mortar with respect to volume fraction of steel fibers, curing periods (3 days, 7 days and 28 days) and saturation of specimens. Factors affecting results of ultrasonic pulse velocity testings are studied to the detail, and it's applications are listed and explained. Testings were performed in the laboratory for material testing in Faculty of Civil engineering Rijeka. Ultrasonic pulse velocity instrument Controls UPV E 48 was used for the ultrasonic pulse velocity testing, while the universal press, manufactured by Controls, was used for the testings of tensile and compressive strength. Total of 54 specimens of cement mortar were made with different volumes of steel fibers. Twelve specimens were tested with no steel fibers, nine specimens with 1 % of steel fibers, twelve specimens with 2 % of steel fibres, nine specimens with 3 % of steel fibers and twelve specimens containing 4 % of steel fibers. Ultrasonic pulse velocity was tested for all the specimens, as well as tensile and compressive strength. Tests were carried out after 3, 7 and 28 days. Specimens tested after 3 and 7 days were naturally moist. The specimens aged 28 days were tested dry as well so the effect of saturation can be studied. Testing results are shown in various tables and charts while being analysed in detail. The effect of the concrete age on the pulse velocity, tensile and compression strength was also studied, as well as the effect of volume fraction of steel fibers and saturation of specimens. Regression analysis was performed using Microsoft Excel.