Nowotny, who sits on the ECB's Governing Council and heads the Austrian National Bank, told Austrian broadcaster ORF that he agreed with his German counterpart Jens Weidmann, who made a similar point the day after the ECB announced its decision.
"In this respect I am in absolute agreement with my German colleague," Nowotny said when asked about Weidmann's remarks.
The ECB said last month it would halve the pace of its bond purchases from January but also extend the 2.55 trillion euro buying programme until the end of next September.
"This new purchasing programme is valid until September 2018 and in my view we should then go about bringing it to an end if the economy develops as we currently expect it to," Nowotny said, echoing remarks he made last week.
(Reporting by Francois Murphy and Kirsti Knolle; Editing by Balazs Koranyi)