Construction of buildings and other civil engineering structures on weak or soft soil is highly risky because such soil is susceptible to differential settlements, poor shear strength, and high compressibility. Soil reinforcement technique by fiber material is considered as an effective ground improvement method because of its cost effectiveness, easy adaptability and reproducibility. Hence, in the present investigation, date palm fiber has been chosen as the reinforcement material and it was randomly included in to the soil at four different percentages of fiber content, i.e. 5, 10, 15, 20% by volume of raw soil. The main objective of this research is to focus on the stiffness and strength behavior of the soil reinforced with randomly included date palm fiber. Direct shear, consolidation and displacement tests were performed. The results of these tests have clearly shown a significant improvement in the failure deviator stress, shear strength parameters (C and φ) of the studied soil with the adding percentages to the fiber length with 1 mm (preferable adding length). Moreover, this adding ratio reduced the displacement of the soil under loading. It can be concluded that date palm fiber can be considered as one of the appropriate material for soil reinforcement.