K Chandrasekaran, manager of SBI's Kalkulam Branch in Kanniyakumari district, was also slapped with a fine of Rs 35,000 by CBI court judge S Ganesan.
The Judge also sentenced co-accused Sindhukumari to seven years rigorous imprisonment and imposed a fine of Rs 13 lakh.
He, however, acquitted her husband R S Money, a CBI release said.
According to the prosecution, Chandrasekaran had sanctioned loans between 2006 and 2008 to Sindhukmari and money by not following norms and procedures, which caused a loss of Rs 66.31 lakh to the bank.