That is according to the body's president Mario Draghi, who has moved to dismiss speculation it may step-up its buying programme in this area in the coming months as a method of easing the ongoing eurozone debt crisis.
Recently, there has been talk among fiscal experts that such action may be a good way of aiding the region's governments in their time of need.
However, Mr Draghi told the Financial Times this is not seen as a viable option by him and his fellow policymakers as it would mean the ECB acting "outside its mandate and legal foundations".
The official noted that conducting such a policy decision could "destroy the credibility of the ECB".
Recently, statistics from the body revealed that banks across the eurozone are becoming increasingly reliant on its funding.
By Claire Archer