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The use of sandwich composite structures continues to be of interest due to its favorable mechanical properties and high strength-to-weight ratio in various applications such as aerospace, shipbuilding, and fuel cells. In this research, the bending behavior of sandwich structure with aluminum honeycomb core and glass-epoxy faces analyzed. The finite element modeling of the structure done under the three-point bending test and using Abaqus software, to investigate the bending behavior. In addition, the force-displacement diagram and maximum bending force, bending modulus and strength obtained. The parameters of face thickness, core thickness and cell size of the honeycomb core investigated as effective input parameters and the effect of these parameters on the bending behavior of the sandwich panel analyzed. To determine the tests and check these parameters on the structure, the Minitab software and response surface method used by using the central composite design. Finally, the optimal sample introduced. Results show that the sample with face thickness 0.4 mm, cell size 6 mm and core thickness 10 mm have the highest bending modulus and the least weight, and the sample with face thickness of 1.2 mm and cell size 6 mm. In addition, core thickness 20 mm has the highest critical bending load tolerance to the weight.