"Even though there is heightened tension on the Korean peninsula, I'm sure that this Pyeongchang Winter Olympic Games will be a great success, with a great deal of stability," Ban told the Olympic Channel in an interview.
"I'm quite confident that we will have a very safe, very peaceful and harmonious Winter Olympic Games in Pyeongchang next year."
Ban was elected head of the International Olympic Committee's ethics commission on Thursday as the Olympic body strives to improve its image amid a string of corruption cases.
The Winter Olympics will run from Feb. 9-25 next year.
(Reporting by Hardik Vyas in Bengaluru; Editing by Mark Trevelyan)