The increase in population in many locations and the value of land has increased significantly. This has made the use of all areas including soft problematic soils inevitable. Due to the lack of bearing capacity of these soils, different methods of soil improvement techniques such as stone columns are used. So, stone columns as a method of strengthening weak soil is used. The stone column technique for ground treatment has proven to be successful in improving these soils, increases bearing capacity, reduces total and differential settlements and decreases the time of consolidation. The main objective of the present paper is to establish a numerical model to represent a footing on soft clay soil reinforced with a group of stone columns. The analysis was carried out using 3D finite difference numerical model FLAC3D. A parametric analysis was performed to study the effect of parameters believed to affect the performance of a group of stone columns. The developed model proved capable to predict the bearing capacity, settlement and lateral displacements of these columns under given soil, load and geometry conditions of group. The obtained numerical results were compared with available published results and showed good agreement.