The committee, led by Sens. Richard Burr, R-North Carolina, and Mark Warner, D-Virginia, said it requested documents that members believe to be relevant to its investigation into alleged Russian meddling in the 2016 presidential election.
The subpoena comes after Flynn would not provide the documents in response to the Committee's April 28 request.
The subpoena also comes one day after federal prosecutors issued grand jury subpoenas to Flynn's associates seeking business records as part of the ongoing probe into the ties between Russia and the Trump administration.
Sen. James Lankford, a Republican on the Senate intelligence committee, told Fox News Wednesday evening that the panel had...
"subpoenaed a large number of documents. He didn't turn those documents over, so we have subpoenaed those documents. We do expect them to be delivered to us."
This is the first time the Intelligence Committee has used its subpoena power since the joint inquiry into the terrorist attacks of Sept. 11, 2001.
Flynn is one of four former Trump aides that Senate investigators sent requests to. The other three are former campaign foreign policy adviser Carter Page, former campaign chairman Paul Manafort and former adviser Roger Stone.