Analytic expressions for stresses and displacements caused by two-dimensional seismic sources for imperfectly joined semi-infinite elastic half spaces having force-like interface are obtained. In the present paper, we have studied the effect of force-like imperfect interface on transmission of stresses across the interface of two joined elastic half spaces. The cases of vertical dip-slip and tensile fault are discussed in detail. Variations in stresses, for different imperfect bonding conditions of force-like and for perfect bonding, are depicted through graphs and mesh grids, using dimensionless approach. A significant influence of force-like imperfect interface on dislocation field due to dip-slip and tensile fault is observed.