The elections are ruled by a corruption scandel from current Prime Minister Najib Razak who is running for his third term against his former mentor and former Prime Minister Mahathir Mohamed.
Critics have concerns the election could not be free or fair.
At 05:00 GMT turnout was around 55%. This is lower than the last elections held in 2013, which where won by Najib Razak.
Najib's right-wing party, Barisan Nasional, has been in power since the country gained independence in 1957.
There are 222 members of Parliament in Malaysia that will get elected today. In the census of 2010 Malaysia had over 28 million inhabitants