Kenneth Gibson has seen off competition from two party rivals and Lib Dem Liam McArthur to land the job.
The MSP for Cunninghame North takes the chair from Alison Johnstone after being elected with 74 votes.
Party leaders sworn in for new term at Scottish Parliament
SNP leader John Swinney was the first to be sworn in following the Scottish Parliamentary election.
Q Manivannan, originally from India, is on a student visa which is due to expire at the end of the year.
Helen McDade, one of Reform's 17 new MSPs, has called for other parties to stop "posturing".
A whole new group of MSPs travel to Holyrood for the first time on Monday but their arrival has been prepared for.
John Swinney will return as first minister after a fifth Scottish election victory for the SNP.
The party has secured its best ever election result after taking seats across the country.
