Can we join directly to banking sector after mba?

Yes, but provided there is such an opening, which are extremely rare. Majority of the Bank positions are filled through competitive exams irrespective of the qualification you posess.

Dear Rucha, if you want to join banking sector, you may surely pursue MBA , you may opt for finance specialization, you will get to study subjects like portfolio analysis, mergers and acquisitions, financial institutions, corporate finance, financial conditions of the market.