The UN labor organization says women in many places around the globe who are better educated, more experienced, and more productive than their male counterparts are still paid less.
The International Labor Organization (ILO) said a "gender pay gap" still remains around the world.
In its latest Global Wage Report, the ILO found men were paid more than women in all of the 38 countries examined.
The biggest pay gap was in the United States, where women earn $64.20 on average for every $100 earned by a man.
That discrepancy could largely be explained, however, by factors such as men's greater productivity, education, or experience, the ILO said.
However, in Europe, Russia, and Brazil, women scored higher than men for such attributes, but the pay gap still existed.
"One of the factors that will account for that is discrimination," ILO Deputy Director-General Sandra Polaski said.