The UN lists Venezuela among its Member States as 'Venezuela, Bolivarian Republic of'
Background
The United Nations Member States list carries the entry 'Venezuela, Bolivarian Republic of'.
Its Date of Admission is given as 15-11-1945.
That makes Venezuela a member from the first months of the UN, which came into being in 1945.
The UN's own member list is the primary record for any question on when a country joined.
Official name on UN list:
Venezuela, Bolivarian Republic of
Date of Admission:
15-11-1945
Kerala PSCUPSC
In plain words
UN United Nations — The world body of sovereign states formed in 1945.