<b>Study on the Energy Level Splitting of the Francium Atom Fr in an External Magnetic Field</b> In This paper the normal Francium atom is considered with the use of non relativistic quantum mechanical approach and the Bohr s atomic model. We study the energy shift values of a Francium atom by the external magnetic fields effect we considered the two cases that effect without external magnetic fields and those of with the external magnetic fields. energy shift, energy level splitting, magnetic field effect on the atom 1714-1720 Issue-5 Volume-3 Win Moe Thant