The frequent occurrence of earthquakes in Indian subcontinent and its effects on various building stocks demand for the effective design and detailing of connections in buildings. In Indian Standard Code of practice (IS 456: 2000 and IS 13920:1993), the joint is usually neglected for specific design and detailing of reinforcements. This may not be acceptable when the joint is subjected to reversible loads such as wind and seismic loads. Unsafe design and detailing within the joint region collapses the entire structure, even if other structural members conform to the design requirements. In the past three decades no significant research work has been carried out in the area of shear wall - diaphragm joint. Hence an attempt has been made to study the effect of various parameters on shear wall - diaphragm connection. In order to study the performance of exterior flanged shear wall-diaphragm joint, one six storey RC building has been analyzed and one of the exterior flanged shear wall - diaphragm joints is designed. Seismic analysis is performed using the equivalent lateral force method given in IS 1893 (Part 1): 2002. In the present study, it is proposed to study the behavior of the shear wall - diaphragm connection with respect to different parameters such as (i) the ratio of height of shear wall to effective width of the slab, (ii) the ratio of vertical reinforcement of the shear wall and (iii) the axial load. Analytical modeling of the shear wall - diaphragm joint was carried out using finite element software package ANSYS. The analysis has been carried out under axial load on the top of the shear wall and cyclic load at the end of the slab.