Inspired by the recent experimental observations of two-proton radioactivity in nuclei 45Fe, 48Ni and 54Zn and successful description of one-proton radioactivity within the framework of the Relativistic Hartree-Bogoliubov (RHB) model, we have employed relativistic mean-field plus state dependent BCS (RMF+BCS) approach to study of the ground state properties of even-even proton rich nuclei in the region 20 ≤ Z ≤ 40. Results of our calculation predicts location of two proton drip line, two-proton separation energies and possible existence of several two-proton emitters in the region 20 ≤ Z ≤ 40. The calculated two-proton separation energy and other relevant ground state properties are found to be in good agreement with the available experimental data which demonstrates the validity and usefulness of the RMF+BCS approach for the description of proton rich exotic nuclei near the drip-lines.