Multiple Myeloma in spite of therapy progresses mainly due to stem cell auto transplant, still remain a deadly disease. About 2000 new cases are diagnosed every year in France. The asymptomatic Stage I MM according to Duries and Salmon's staging are usually only watch over and only treated at progression. Zoledronate is a third generation aminobiphosphonate (BP), probably the most powerful among the available compounds which received market clearance authorisation in MM with bone damage. During MM, bone's hyper resorption is premature. Interactions exist between tumor growth and bone lyses. Zoledronate's got a proper antimyeloma's action (induce plasma cells apoptosis). We propose to test the early use of Zoledronate as soon as stage I MM to delay progression.