if you are talking about United Nations Security Council then Five members has the right to veto
Veto- A constitutional right that can be used to reject a decision or proposal made by a law making body. This is given as an absolute power that has no consequences inflicted upon the user body when used
Since the creation of UN five permanent members up to now has the power to use a veto.
They are-
- United States of America
- United Kingdom
- France
- Russia
- China