The Swedish Economic Crimes Unit said that one of the men going on trial was an SEB employee, while the other two were customers. The employee is charged with gross breach of trust; the two customers are charged with fraud.
The customers are a businessman working in the telecoms industry and one of his employees.
The suspected frauds took place in 2001 and 2002. The men were arrested in 2003.
The employee was sacked by the bank when he came under suspicion for the fraud in 2003.
The suspects have made partial confessions to the crimes of which they are accused.