In a pulse chase experiment, seedlings of mung beans were loaded with radio-active isotope (22Na) in 50 mM NaCl solution for 4 days. Individual seedlings were transferred to non-labelled salt solution and the retranslocation of sodium was studied over a period of one week. Growth of seedlings was also studied during this period. Net loss of sodium was observed from roots and stem to the root medium. The leaves accumulated some of the retranslocated sodium as well. The rates of sodium retranslocation and other relevant data are discussed in this paper.