The composite parts bonded with embedded single lap joint (SLJ) subjected to tensile load were analyzed previously. The embedded adhesive was applied between two composite parts and the mechanical behavior of the joint was examined. In this study, composite parts bonded with single-lap joint (SLJ) and double-lap joint (DLJ) subjected to tensile load were analyzed by using 3D finite element method (FEM). The advantages of two different joint methods were investigated. In the analysis, the composite parts were carbon/epoxy (AS4/3501-6) with different fiber orientation angles and the adhesive was DP 410. The models for the numerical analyses were generated by using the ANSYS software package. The finite element analyses (FEA) were carried out to predict the failure loads. Stress in x-, y-, z-directions, shear stresses and the von-Mises stresses on adhesive were obtained at time of failure for predetermined parameters. Consequently, the effects of orientation angles, overlap dimensions and joining methods were examined. The most effective parameters and joining process were determined for composite parts with single-lap and double-lap joints.