Abstarct: The electromagnetic form factors of proton are calculated using the bag model wave functions. We take proton as a bag; contain three constituent quarks which interacting quarks in proton with color potential. In order to describe the three quark dynamics it is convenient to introduce the hyper spherical coordinates. We calculate the Dirac equation for proton contains three constituent quarks. Conserved angular momentum operators and their quantum numbers are discussed. The eigenfunctions of the total angular momentum are calculated for three – quark system in the bag model. The radial equations for a spherically symmetric system are derived. Keywords -